Procomp bbc heads. Large oval port with an open looking combustion chamber.

Procomp bbc heads ; 317 Series with 317cc intake ports, 119cc ProComp BBC Heads. The heads from Dart and Procomp Electronics were as-cast with no additional machining of any kind. 88" exhaust valves, 7/16" rocker arm studs, . For example, two heads tested without the manifold flow the same CFM. 1 comp. 575”x 2. Alternatively, you can use Victor Reinz # 4918(R) & #4923(L) head gaskets on Mark V blocks with our heads. We proudly carry powerful small block, big block and aluminum cylinder heads that will raise horsepower and help optimize your engine's performance. I am wanting a set of aluminum heads, more for detonation than anything, but the performance over a set of chevy steel heads, and of course the look too, would be great. But if you are looking for an affordable head, I have been looking at the Promaxx heads prepped by Straub Technologies. even put them against my iron eagle and pro1 heads that were borrowed. per head cdn was a bit much, I bought a pair of large oval port, 305cc runner, 119cc combustion chamber delivered to my door for $1,100. 505 BBC. 250” or 2. Is the heat treat correct on the head so that it doesnt' crack under extreme Using A Procomp / Speedmaster Oval Port Cylinder Head On 467" Big Block Chevy Dyno Test The ProComp 360cc CNC BBC heads flow more or just as good as the Edelbrock Victor series heads. 300” Intake Port volume: 320 SM-327cc, 320 FP-346cc Intake Engine Tech - Here we go Pro comp bbc head questions - Hi ever one. Pro Comp is an R&D company. The dual-plane intake manifold from Pro Comp offered a near-ideal combination of torque and power production for use with the factory (peanut) oval-port heads. Removed a . I have heard the 96 and later 454 vortec head, (it has a small combustion chamber), works well on a 396, but piston domes might need a massage. Being very heavily involved in head-porting the "country of origin" doesn't amount to a "hill o As with all Procomp cylinder heads, our Big Block Chevrolet heads are Gravity Die Cast. I bought a car that has Pro Comp heads on it. Focus ZX3. Just by comparing the manufacturers head flow sheets, they are not that much different. These heads accept the same CNC program we use on the Edelbrock heads and produce similar flow numbers. Port Dart (opening – 1. Moderator: Team. While the slightly hotter 12 is intended for more lite throttle, stop and go city driving. neither of my friends valve seats have fallen out, yet. 0 CFM; CFM Exhaust at . Pistons: Most aftermarket pistons. These heads are bare and were at the machine shop to get cleaned up and checked to assure all is perfect ready to install valves and run. I'd like to hear from anyone who has a set of BBC Pro comp heads and running them now stock out of the box. 11 gears. 88 stainless (back-cut and swirl Pro Comp Heads Flow numbers. roller and 10. Share. 727 posts · Joined 2008 Add to quote; Only show this user #1 · Jun 28, 2010. It never seen 2,600 rpms and a chunk of intake runner came out. By the time all the corrections were made, it tookeo away the effect of the bargin. FF281. GOSFAST Discussion starter. i dont care if you can build a stroker 434 and put aluminum heads and everything else,it would still only have the same hp as this big block maybe more maybe less if you Mark, the best would be RHS 320's for a USA castings. I have a set of 781 heads now and am considering a set of pro comp oval port 118cc combustion chamber cylnder heads through Skip White. 30" intake / 1. Equipped with the Procomp heads, the BBC stroker pumped out 690 hp and 600 lb-ft of torque. 6 valves. Alternatively, you can im gonna start off by saying im into mud racing . 600 232. The Sniper series consists of all our 24 degree, conventional port BBC products which include intake manifolds, cylinder heads and cast valve covers. Dropped compression back a bit. reply to 454cutlass-procomp heads I use electronics pro comp heads on my 504 chevy and have never had any problems. 99 Current price is: $899. Thus, the intake manifold head combination is critical to flow and horse power production. I am leaning towards a streetable 454 with some good heads. Glass bead the coarse end threads that go into the block to remove the black oxide coating. 7878 posts Patriot’s Freedom Series heads meet the demands of the BBC world, while keeping the quality high and the price reasonable. 19-1. I have manufacturers flow numbers if you want them but you can get them off of Procomp's website. Order high-performance cylinder heads online today. This budget friendly head is perfect for your 509 to 540 Cubic Inch operating below 6500 RPM. General Engine Discussion. Given you‘re using headers my choice would be ACCEL 0414S-4. BBC oval port 063 closed chamber as close to stock as I can imagine, stock valves sizes no back cuts. 030 over 1978 454 for my 72 4sp nova. Re: Pro Comp BBC heads. I was changing the starter on it and pulled the plugs. If you can't afford to build a BBC unless the heads are made by kids in China after school or on weekends, you probably shouldn't be building the BBC in the first place. All Procomp aluminum cylinder heads feature the following: High Grade Aluminum; Bronze Valve Guides; Hardened Seats; Advanced Port Design for greater flow; Multi angle seat design for performance valve springs; SBC Alloy Heads 64cc / 160cc A/Plug; Bare Head EQ is only casting iron at this time. I've seen plenty of broken off rocker stud bosses on aluminum heads (all different brands). ratengine Discussion starter. Just the conventional siamesed port heads are available in 27 different models, with options Anybody have any opinions/experience with the Pro Comp 320 Alum heads. 88 exh valves On paper, the specs on the BBC heads supplied for the test certainly looked impressive. the local machine shop took a I have two friends with them. 360cc Intake Runners 125cc Combustion Chamber Intake flow is 404 CFM at . be quicker than say newer C3 Tech/Performance - BBC Pro Topline Head Questions - When I upgraded my 468 I knew I wanted R-port heads and I wanted them to be aluminum. (Quote)BBC Pro-Comp Heads/Flow Numbers This info relates to the "Chinese/Australian" BBC heads being sold under various brands, but they ARE from a single foundry. About this product. Custom; 2000cc (3 Bearing) 2300cc & 2000cc (4 Bearing) Hydraulic Flat Tappet; 2300cc Roller Cams; BBC Pro-Comp; BBC Pro-Comp. The first one is a set of 190cc Pro Comp heads with 2. I traded some work for them procomp heads they are aluminum! just cheapo's i would not buy them assembled !!!!! almost every set we've put on a engine (just bbc) the bolt holes need chamferd cause you cant hardly get a socket on them but once you make the mods there is nothing wrong with them but like i said assemble them your self! or you might be in trouble with a race engine or where Engine Tech - Pro Comp heads, any good???? - I recently had some major damage to my heads, they were Bowtie alluminum on my 496 BBC, question is, I have saw a lot of adds for the pro comp heads and was wondering if anyone had used these or if they are any count. The exhaust port is shaped in a way that makes it possible to port it to be very effective. 880″ Exhaust Valve . 43 posts I did a mild port job on a set of BBC Pro Comp heads about a year ago. We went with the smaller valve to keep our precious P-V in line. 1ltr)? Block cast. He runs it in a 55 chevy old time gasser. About the same time I was porting these Patriot bbc heads I was porting a set of Procomp BBC heads. 1:1 Comp. Install with a thin steel shim head gasket for max compression probably cheaper to just replace the flat top pistons to get compression. Going over the bbc profiler 320cc head it is slightly different from stock Keep in mind as you lower the deck (head or block) the intake width moves closer meaning the intake sits higher relative to the port. It has a mild . Joined Feb 11, 2007 · 1,156 Posts #21 · Jul 11 I personally own a set of 320cc non cnc ported pro comp BBC heads wich I have flwoed and have had two machinist look them overgood low lift numbers peaked above 350cfm out of the box Chevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later Big-Block 454-cubic-inch and 502-cubic-inch engines. Lesson learned Re: ARP Head Bolts For BBC ProComp Heads Post by ProPower engines » Mon Dec 12, 2011 6:29 pm Seems to me they are the same length as the mid-late 90's 454 with the extended length bolts over the exhaust ports. However the engine that has the Procomp heads on it does not make near the power of the Patriots. Real Race Cars Don't Have Doors. I'd probably go with bare and buy valve train from Competition products. 060 over) and just traded a set of tires for a pair of procomp heads part number pc3021-396. 567 posts · Joined 2009 Add to quote; Only show this user #1 · Nov 6, 2015. The Pro Topline heads fit my budget and looked like they had respectable flow numbers. Custom; 2. HYDRAULIC and MECHANICAL CAM VERSIONS PRICING IS PER PAIR ROCKER SYSTEM IN PHOTOS IS Joliet, IL $4,435 Posted 3 days ago. the aluminum is sooooft and porous. Finger happy aren't we . Thick deck - Can be used with Nitrous or Superchargers 205cc Intake Runners 64cc Chambers Straight & Angle plug Available - ship straight plug unless you request an PROCOMP SBC 205/64CC COMPLETE ALUMINUM HEADS WITH STUDS & GUIDE Ok I found a set of new aluminum SBC Pro Comp heads for a good price, 2. For immediate assistance during normal business hours you may contact customer service at 800-776-0767, or visit our page of Frequently Asked Questions. 050 , . is has comp springs and comp roller tip rockers on them. I know there are better ones out there (AFR, BRODIX, etc. Engine Tech - Here we go Pro comp bbc head questions - Hi ever one. 70 Chevelle SS clone (632 CI powered). Shop owner passed away (old age lots of wisdom) so I got the engine mounted in the rail dragster ready for break in oil fuel n plugs. 315cc FloTec heads. Automotive Machining, cylinder head rebuilding, engine building. 530 lift . Patriot’s BBC heads come as cast with a 320cc intake runner, US made bronze guides, and a 5 angle valve job. S. we worked are assets off to get that engine to run as good as his old junk. We suspect the large port volume and sizable combustion chamber hurt torque and power on this I have a older pair of Pro Top Line BBC 360 port heads. 3. So yea it is a F$#@! rocket. 880" EX. ProComp/Speedmaster recommends NKG R5671A7, Autolite 3924, or Champion RC12YC. The short block has all good stuff, no questions there. 02int, 1. I am in the middle of a 505ci BBC pump gas street/strip motor w/goal of 600hp and mid 6 sec 1/8 mile times. More importantly, the flow gains came in the lift ranges (sub . Silver & Black 69 CAMARO Discussion starter. Large oval port with an open looking combustion chamber. 5:1 cr on this motor. 250″ intake valves and the larger 360’s taking 2. 0 with the 84cc rpm heads. These are what we now use on our 505, 555, and 572 BBC engines. Equivelents are AC R42T, R42TS Autolite #23 bbc procomp heads. 100" Spring including dampener; CFM Intake Long Runner at . Find many great new & used options and get the best deals for PROCOMP 320cc Aluminum Big Block Chevy Cylinder Heads PC3021 Do you know anyone who has recent experience with Pro Comp BB Chevy heads? I would like to know if such sentiments are still relatively current or am I being to harsh. Is the heat treat correct on the head so that it doesnt' crack under extreme Patriot and Pro Comp are NOT the same. Either of the 2 mentioned heads can make a 496 with 900Hp with a bit of work and proper thought out game plan. 00, price adds up real fast. Personal friend decided to buy some 'aftermarket' roller rockers for his BBC street/strip TA. For sale is a FRESH from machine Shop Pro Comp 320cc Runner BBC Conventional Heads. Brand. 92 - $3875. Both Pro Action heads have 1. $3749. 2 114 106 86. Hi my question is are big block chevy procomp heads any good? can they make any good power and torque? i have a 468 with gm BBC Big Block Chevy Aluminum Cylinder Heads Bare Casting 345cc Rectangle Port $ 1,299. I don't have the flow numbers in front of me but I remember they were suprisingly good. Your most affordable, quality choice is probably the Edelbrocks or CanfieldsCompetition Products has I have a set of the BBC procomp heads on my big block. I have a 87 TransAm GTA that weighs 3800lbs with driver, 28" tall tires 4. Sort by Oldest first Oldest first Newest first Most reactions. They're very good heads especially for the money. cobalt327. It is called a "medium race port"gasket,and I usually gasket match any 200 thru 220 cc heads I run to that gasket,and use both Victor JR and Strip Dominator ported to match. Alternatively, you can view our product overview pages for more information. I get a chuckle every time I see some pro comp combustion chamber. 600 lift. To install our BBC heads on Mark V blocks, you will need to use our PC5233L and PC5233R Elite Series MLS head gaskets. He put them on a 598 and it made 880 hp and on up in the 700's tq on the engine dyno. 90's In the quarter but have not run the quarter since figuring out some issues, Car & motor Have for sale a set of used pro comp cylinder heads had on a 496 just upgraded to a set of brodix selling the heads with a set of comp roller rockers heads have not been damaged or repaired pro comp bbc heads - Car Engines & Engine Parts - Mount Olive, North Carolina | Yes, the NKB is the same as the ProHeader/Assault Racing/Southwest Performance/AFR Enforcer casting(and half a dozen other Ebay vendors), and now ProComp/Speedmaster is using it as ONE of the 4 or 5 different SBC aluminum head castings they sell. Without even putting eyes on a head, weigh it bare and compare to heads made by Brodix, Dart, Edelbrock. An As Cast head that is just as efficient as competition’s CNC ported pieces. 22 posts · Joined 2008 Add to quote; Only show this user #1 · Jun 17, 2008. 0 Throttlebody 4l80e Pro Edge 4000 lockup EZ-TCU Strauby HyD roller ( 6. 030, aluminum rods,stock crank,comp nitrous roller cam,bone stock 990 heads je nitrous pistons, made 687hp on nuts and 1132 on nitrous. Procomp Electronics; 909/605-1123; ProcompElectronics. Heads supplied by Brodix The Ultimate budget build!!Ford makes it, Chevy shakes it86 Coupe S/S, BBC Powered 10 to1 489ci very mild. Flowed on a 4. Jump to Latest 2K views 2 replies 3 participants last post by creeper72 Jun 18, 2008. Changed from old ported Rect port iron heads to oval aluminum aftermkt. The seat and guides are very good quality and they machine very nice. 600 320. 880 valves, 13. The Procomps have some issues that cause it not to make amazing power. There are a few reviews here, search and ye shall find. The ports are taller,but the bolt holes are all the same. Dan Reinagle Discussion starter. 541" lift, ~290 duration. All Articles Cars 300CC BBC OVAL PORT CYLINDER HEAD prev next 300CC BBC OVAL PORT CYLINDER HEAD Love it Compare. The one in the picture is the first pro comp head I've seen broken like that. ID number location Question 2. i dont care if you can build a stroker 434 and put aluminum heads and everything else,it would still only have the same hp as this big block maybe more maybe less if you Pro Comp Heads at Machine shop. 60 The Dart Big Block Chevy Pro 1 Aluminum Heads were inspired by Dart's championship-winning Pro Stock designs and available with 310, 325, 345, or 355cc oval or rectangular port intake runners, big block Pro 1 aluminum cylinder heads deliver out-of Pro Comp is an R&D company. 31fordcoupe Discussion starter. I would never own either, unless I was building a small street piece that didn't need killer heads. 5:1 with aluminum heads I suggest a NGK 5 heat I never even looked at the head casting numbers. More items related to this product. 00 to rebuild and machine for 2. 1725 posts · Joined 2002 Add to quote; Only show this user #1 · Feb 2, 2007. Completely different qualiity than any other Chinese casting that I've had my hands on. 2012 and it didn't even make it through the break in. 8 270 256 180 Stock Procomp Rectangle port 320cc 2. Close to 400cfm at . Dart BBC Adjustable Guide Plate Retainers: 1. of the Pro Comp BBC heads. They were Tom VenDerGeld's, of Low Down Hot Rods, who built Rod Suboury's 6 second street legal Vette, heads he used on his sons dragster. If the CHI is a 10 the procomp is a 9. pro comp bbc heads #1 Post by 427belair » Fri Feb 02, 2007 5:35 am This is my first post here, great site full of information. Looking for ideas for what heads to run. they did roughly 1260hp. com. The 9 is a little cooler heat range, suited to "high performance driving" including towing. They do work as well on the aluminum pieces. 3 178 173 115. I've seen some good running cars at the track running them. pro comp head questions. Although similar in appearance there are some conditions that the customers may not Here, we have two sets of Pro Comp Heads that are going to be put to the test to see if the CNC-porting is worth it's price. the guy bought a 638 from. 005” = 1cc) Flat mill only. You buy these complete Promaxx is not Pro Comp heads. They seem New set of BARE Aluminum Big Block Chevy Motorsport Heads (2 heads) Produce Up To 748 HP Out Of Box With Advanced Port Design; Manufactured from 356-T6 aluminum; Have Accessory holes to except factory accessories. 36 posts Previous; 1; 2; 3; Next; Keith Morganstein Guru Posts: 5566 Joined: Sun Feb 19, 2006 3:19 pm Location: MA. 1005/6 292071057911 302267618285 New Complete set of Aluminum Small Block Chevy Motorsport heads. Those BBC ProComp Heads : i did the bare-minimum Bowl porting or clean up, especially on the Short Turn Curve its nowhere a max-out Bowl Port Job !!! i went back and checkout the Vertical Mill's Tilt Angle setup it was still setup for Intake side . 8/29/2018 H38 Dart 310, 325, 345 BBC Aluminum Cylinder Head Part# 19100000, 19200000, 19300000 I have a set of new Pro Comp aluminum 64cc/190cc heads on my 383 SBC with a Performance products dual plane intake (Edelbrock air gap clone). Author. Jump to Latest 14K views 5 replies 4 participants last post by pdq67 Jun 30, 2006. These were complete heads. I've used a couple sets of ProComp heads now without Pro Comp BBC Heads. I picked up a set of the pro Comp 3051c 460 heads that are suppose to be 300cc runners and 75cc combustion chamber with 2. 1 2 3. Same combo with nearly stock 041s will make 375 HP. 323 posts · Joined 2005 Add to quote; Only show this user #1 · Jun 29, 2006 (These are the castings that Paul (pdq) keeps referring back to up here) Procomp BBC Heads. a big name engine guy. Rapidride2. Thick deck - Can be used with Nitrous or Superchargers 190cc Intake Runners 64cc Chambers Straight & Pro Comp aluminum BBC heads any good? I am very new to building chevy engines so i am asking if anyone has used these aluminum heads for a BBC?I can get what seems like a great deal on a bare set ($700)Here are the specs that the dealer gave meThey look to be closed chamber, rectangle port, 115 cc chambers 320cc intake, raised exhaust ports BBC Pro-Comp Heads/Flow Numbers. Pro Comp is being sold as Speedway Heads now. 2 months later the engine was apart for a new set of pistons, 4 sleeves (only one required for the actual damage) and a new set of yella terra heads. Can't seem to quit Head Bolts/studs: Bolts – ARP# 135-3603 Studs – ARP# 235-4103 Manifold:Rect. 25-inch intake valve. 99. 625-inch). tag# M364978 Asked by: The Scalliwag. The ProMaxx 723-2211 cylinder head does not fit an 8. Swapped heads for a set of AFR 195s horsepower leaped to 547 HP at 7700 rpm. 850"+) and the springs required to go with that lift and roller cams, but otherwise just fine. I've used a couple sets of ProComp heads now without Find Parts and Accessories pro comp aluminum heads bbc KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing! I was looking at the AFR budget heads but heard they weren't much better than pro comp. 800 *Flow numbers are approximate. The pro-comp shite has a pretty big rep over here for dropping out the Pro Comp BBC heads. 880″ exhaust valve seats, and 119cc combustion chambers. 10secBu Discussion starter. ;) Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software BB-Chevy Freedom Series Heads. Brand new in box Pro Comp Aluminum Heads, complete with Valves, Springs, etc. General engine tech -- Drag Racing to Circle Track. Money IS a factor here, so I was looking at the ProComp brand. 1K views 8 replies 5 participants last post by mc0311grunt Nov 7, 2015. 2 BARE CNC PORTED Aluminum Big Block Chevy Pro Comp Motorsport Heads Manufactured from 356-T6 aluminum; Have Accessory holes to except factory accessories. Save Share Reply Quote Like. 00 a pair assembled. 88 valve package, though you can upgrade to a larger 2. New set of complete Aluminum Big Block Chevy Pro Comp Motorsport Heads Produce up to 734 HP Out Of Box With Advanced Port Design; Manufactured from 356-T6 aluminum; Have Accessory holes to except factory accessories. i have the strike force heads by pbm which is pro-comp also,both are copies of pro topline. 300/1. Went to a . Great price thanks Jeggs CRAZYTim Dragracing. RHS/Pro Topline are affiliated with neither, and their heads actually make power. Top. we had them on 632 . 650 lift hyd. 76@103 w/3. I need to replace both the intake and exhaust valves. is still going in about a week i will give you some track numbers as a friend of mine just built a 14. But I called Indy about thier 440EZ heads and Russ told me i was gonna lose around 100 hp if i use the small Eddy head. It will flow more air than a chi head when done right. 7-1, Ported Sniper JR, 268 cam, under . 60 exhaust 64cc, 190 cc intake runner. 5 to 3. we bolted them up , installed a solid cam ,like 254 @ . Joined Feb 11, 2007 · 1,156 Posts #21 · Jul 11 I personally own a set of 320cc non cnc ported pro comp BBC heads wich I have flwoed and have had two machinist look them overgood low lift numbers peaked above 350cfm out of the box As with all Procomp cylinder heads, our Big Block Chevrolet heads are Gravity Die Cast. Pro comp 295cc heads for BBF any good?www. tt 383 Expert Posts: 521 Joined: Thu Nov 20, 2008 1:46 am Do these heads fit a 2003 gen 7 vortec tall deck marine 496ci(8. W Pro Comp BBC Big Block Chevy Rectangle Aluminum Cylinder Heads 454 502 Complete. I have new shortblock stroker being built and was gonna use some Eddy RPM heads. I have read that the rocker stud holes are not good but if you run a stud girdle wont that tie all the studs? I see the im gonna start off by saying im into mud racing . Post by F1Fever » Thu Nov 25, 2010 4:55 am. Chevelle Malibu ss 64 489 BB with parts from As far as installing head studs, this method was recommended to me and works well. Standard port location versions available as well as the super raised runner designs. serial # 12558110 Man. 30/1. 5. Sold individually. sschevellefan. 7 273 255 175. So with all that said, does anyone know for sure which stud girdle will fit The ProComp/Speedmaster BBC head casting needs the long style ProComp bolt or stud set. DO NOT BUY PRO-COMP HEADS !!!!! I helped a friend assemble a 351 Windsor and when it came to the point to check the piston to valve clearance, the rocker arm tip to the valve was off. Up to 10. 1971 Chevelle SS454, T56 Magnum 6 speed, 3. 700 lift, 1050 QF carb 743@5300 and 851@7300 So make your own conclusions . 88 valves. 343 posts As far as installing head studs, this method was recommended to me and works well. Jump to Latest 20K views 31 replies 21 participants last post by ksmith0110 Mar 11, 2022. blastertech70 · Registered. Compare to any brand, this head makes power! I did a re fresh on a big chevy for a customer recently. There is a reason they didn't put there name on them. It is pretty well known that these heads are the ProComp casting, sold under various names like Strike Force, Striker, Short Turn, and others that escape me right now. BBC (1) RATING No Rating (6) PRICE $1000 TO $1500 (2) $1500 TO $2000 Toss in the fact that cast-iron BBC heads weigh a metric ton, and the choice is a no brainer. These heads look just like Procomp as far as castings go. 496 BBC AFR 265cc CNC Chambers FAST XFI Sportsman 2. I have bought them new complete, as low as $699. Shame to the money-grubbing whores at ProMaxx who are attempting to line their pockets by Dart 320cc BBC Aluminum Cylinder Head Part# 16300000 thru 16375136 Material: 355-T61 alum alloy Comb Chambers: 119cc or 139cc (121cc or 141cc w/CNC) Intake Valve Dia: 2. Top #84Dave Expert Posts: 875 Joined: Thu Nov 24, 2005 6:08 am don't know much about either ,so probally both. 310 bore no exhaust pipe. I can read the numbers on the valves, example intake 250G - YH and the exh 100H - YH. 250”) 6. the guy with the sbf set AFR's 335cc BBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. 3. pro comp heads yes it has been discussed but my questions are still unanswered the discussion went to communist Chinese instead of product failure. ProComp Part number PC3021. Listing ID 184459746. 8 block w/ forged internals. Set Descending Direction. 36 posts Previous; 1; 2; 3; F1Fever Guru Posts: 1693 Joined: Fri Feb 17, 2006 2:17 pm Location: Okla. This head will change the industry. Well, those pretty, and cheap, rockers lasted a whole 400 miles. Pro comp BBC head Q. 053 @ 112mph 1/8th, Has been 9. 700" lift and is the bbc procomp head and boost question. 31 Posi Youtube Channel. 7878 posts Flotek 290 bbc head, anyone. Mine are cnc ported monster valves and the FYI, will be running Brodix Race Rite 270 heads. Has their quality improved? Does PROCOMP have BBC heads for roller cam? Can these heads be made to work with roller camshaft? Asked by: Lightftr I personally owned a set of BBc ProComp heads, that on the same 500+ inch BBc in a dragster, OUTPERFORMED these AFR 335 heads. 918 posts · Joined 2009 Add to But I have seen pretty impressive dyno nr´s with pro comp bbc heads a couple of times, also seen a couple of solid roller springs equiped pro comp head with broken rocker stud holes. 550” – Moly Steel (10°) Spark Plug: . 19/1. Question 1. Independent flow bench testing shows over 400 cfm with 2. B. Those are Pro comp heads, they are made offshore probably China, I would spend the extra money and buy a set of real heads like an Edelbrock, you will sleep headache free . 25int. 5 posts • Page 1 of 1. 0 to 10-1 so it will be pump gas friendly. This is a cylinder head flowbench database. 700" lift and is the About the same time I was porting these Patriot bbc heads I was porting a set of Procomp BBC heads. They "stepped up" to the Pro Comp heads and lost 1/2 second They put the World heads back on and got their lost ET back and then eventually went w/ some AFR's and picked up over 1/2 sec over the World heads. the RHS 320cc BBC heads were a 300CC BBC OVAL PORT CYLINDER HEAD prev next 300CC BBC OVAL PORT CYLINDER HEAD Love it Compare. From what i have read ever one thinks the procomp bbc heads are junk but i have seen a set and they look like a quality casting. Sept. 02 intake, 1. cprgarage. Post Procomp heads are available bare, complete and fully CNC machined. 250 int. Wishlist $3,749. 643 dur, Accel HEI, procomp heads (I know lol) Quick fuel brawler 850 mech secondaries stock jetting 78/86 The Brodix BBC heads I bought came with a recommendation to use NGK R5671-A7 plugs for pump gas. Moderator: John_Heard. He bought bare heads and then had fully ported with Has any one had any experience good or bad with the Procomp 320 CC BBC heads? I had a guy buy pro comp heads for a holden V8, they wher 800 dollars cheaper than yella terra heads. Dart Pro 1 CNC Ported, 360 BBC Cylinder Heads, Assembled. Contrary to all the negative posts on the net. the local machine shop took a 66 to 69 396 oval port heads with small 96 to 100cc chamber Gen 6 454 Vortec heads 100cc chambers Mill to as close as you can get to a 92cc finished chamber size for a 9. 2K views 10 replies 8 participants last post by Busted Knuckles Sep 14, 2010. rocker stud bosses have been reported as breaking with really big lift(. Rated 5 out of 5 by CRAZYTim from Nice heads Bought these heads for my 427 BBC ,work great ,there not pro comp heads. 600 lift) employed by our hydraulic flat You're using the BBC heads, so this doesn't apply quite as much than if you had SBC heads- but there's been the misconception that the 8mm valve stem locks and retainers will interchange w/the 11/32" SBC parts. pro comp bbc heads #1 Post by 427belair » Fri Feb 02, 2007 5:35 am Re: procomp 210cc heads what intake to use The 1206 gasket is for a standard intake. 750" Lift 320cc Intake Runners & 119cc Chambers 2. J. The price seem reasonable at $1100. I have read that the rocker stud holes are not good but if you run a stud girdle wont that tie all the studs? I see the aluminum pro comp heads 320cc intake runner big single plane and 1050 dominator with 2. Ended up with some 11:1 pistons and decked the block installed a Comp magnum 280H Flat Skip White BBC Heads. Port BBC Heads with 115cc Open I used these heads for about 7 years without a hitch. So whats makes them good? 64 Chevelle 496 64 F100 Street Rod with BBC /Chevy trapped in a ford body . 92 SOLD AS A PAIR. Being very heavily involved in head-porting the "country of origin" doesn't amount to a "hill o The Pro Comp casting is fine, as long as you aren't expecting a head to go 900hp. Please HelpTrying to make a decision on heads. Is the material between the combustion chamber and water jacket thick enough to take the abuse of a 700HP BBC. 75 SOLD AS A PAIR The 300cc oval port cylinder heads feature 100% CNC machined intake runners, exhaust ports and combustion chambers; our 300cc oval port flows 388 CFM at 0. Jump to Latest 2. Valve Sizes Angled Spark Plug Holes Single Aluminum Head Pro Action Big Block Chevy Aluminum Heads First-rate performance, progressive engineering and unmatched quality are the foundations of the Pro Action head If you are on a reasonable budget. I own a new set of Dragon Slayer 320 BBC heads with 2. The 781's I have been quoted 250. here it goes. 12:1 355 with a solid flat tappet with ported Pro comps. 1L engine. Head #1 has a raised port that when COMBINED with a real world intake manifold EASILY out-flows the Head #2. FWIW, I know their cnc'd BBC offering under an 8-71 bolted to 572 cubes don't Ideally flow tests will test the cylinder head AND intake manifold as a pair. Price is for bare set of heads. ( 4 bolt block,blower and pro comp heads) i have some doubts about the heads since they were so cheap. Running pro comp rectangle port heads. i already had some parts laying around . That's why I ask. they fared very well. So after running for a couple seasons with the PC heads, they swapped to the AFR pro comp bbc heads. joes69 Discussion starter. 360cc Intake Brand new in box Pro Comp Aluminum Heads, complete with Valves, Springs, etc. Im not sying their any where near the best, but their not crap in my opinion. YEP I just said or admitted that I do own a set of PRO COMP BBc heads. Thick deck - Can be used with Nitrous or Superchargers 205cc Intake Runners 64cc Chambers Straight & Angle plug Available - ship straight plug unless you request an PROCOMP SBC 205/64CC COMPLETE ALUMINUM HEADS WITH STUDS & GUIDE What the best BBC oval port heads, as far as port size and flow? Please help trying to make a decision on heads. 300 valves. As good of a head as just about any USA conventional head. 5K views 6 replies 6 participants last post by moneyrunner Jul 4, 2010. $ 899. These are 320cc Rect. 19 and 1. but if you can get BBC "PRO COMP" Aluminum HEADS -- PC-3021. I use Manley valves and Comp Cams or Isky springs on most of the hot (. Before you throw money at heads that are hit-and-miss quality and set-up, check out ProMaxx. Autolite We are committed to customer satisfaction, and will respond to your request within 24 to 48 hours. What the best BBC oval port heads, as far as port size and flow? Please help trying to make a decision on heads. Thank you. everybody told me that my runners were too big but they work great on my ride but i also have a 70 camaro. fuck a small block. These square port aluminum heads feature 310cc intake runners, as-cast 119cc combustion chambers and raised exhaust ports (. Exhaust flow is 307 Engine Mods - ProComp 320cc BBC Aluminum Head - Does anyone have experience with these heads? I see them on Ebay for $1000-1200 a pair complete. 250" IN. What long tube headers will fit this style head. 1 Item . Jump to Latest These are for the OEM SBC and BBC head bolts to help save the bosses on the cast iron heads. Where online are the specs of the Pro Comp BBC heads listed? The Pro Comp Cleveland is really really a nice casting. this may be taboo but was wondering if any one has used procomp bbc heads on a boosted big block. we have a set of pro-topline and The 70's era BBC oval port street motors that use the small "peanut plug" work well wiith a Champion RBL9YC , to RBL12YC. 625” – Tit / 1. item 1 Big Block Chevy Aluminum Bare Cylinder Head Pair BBC 427 454 502 123CC/336CC Big Block Chevy Aluminum Bare Cylinder Head Pair BBC 427 454 502 123CC Mike Rogers wrote:I have a customer that bought a pair of the Procomp BBC heads dose any one know what ARP head bolt number is to be used with these heads. im running a 408 bbc (396 . Pro Comp heads are useless junk an make zero power, Patriot heads are a little better. 21008 posts I am building a . assembled. M. moneyrunner Discussion starter. Js yielded big dividends. It was shop built while I was away for work. If you used those heads with an out of the box pro comp bbc heads. I had the machine shop slap in some 2. my car is lighter than most others. Save Share Reply Had a buddy that had low budget truck puller. 1 66 59 45. Thinking about going with Dart 325 Pro 1 with 2. 1. For the record the customer bought these assembled on ebay for $630 for the pair. It baselined at 442 HP at 6800 rpm. EQ heads come from Australia, RHS heads come from New Zealand and Pro Comp heads are made in China. RHS can go just about any way or power level you could want. I recommend the Pro Comp 290 runner oval port aluminum. after a visual inspection the only minor Looking for recommendation for valve springs for my 496. 1001/2 351633229200 291996169160 New Complete set of Aluminum Small Block Chevy Motorsport heads. Has anyone used the procomp BBC rec. Kudos to the folks at Edelbrock and other places who still manufacture in the States. Im looking to buy a new set of BB Chrysler heads. I hear you loud and clear since I'm in Canada and you ADD another 40+% to that $2,400. The heads will run 300cc oval Engine Mods - ProComp 320cc BBC Aluminum Head - Does anyone have experience with these heads? I see them on Ebay for $1000-1200 a pair complete. pro comp bbc heads. BBC Pro-Comp Stainless Steel Using A Procomp / Speedmaster Oval Port Cylinder Head On 467" Big Block Chevy Dyno Test 🏁 Bravo 335 BBC Heads (set of 2) The Bravo 335 BBC rectangular port heads are perfect for 454, 496, 540, and 572 street/strip engines. D. bare, the 210 pro comp sbf head weighs a good 5lbs less my sbf RHS 215s bare. 25” tall (. Port BBC Heads with 115cc Open Chambers. 00 to open up the spring pockets for the new valve springs. $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: LASTCHANCE. 040 bored XE268H Cam, Pro Comp Roller Rockers, Pro Comp heads, 60cc, 2. I leaning towards getting a set on Ebay I am planning to buy a set of procomp heads in the spring for my 461 bbc engine. PC3028 2 BARE CNC PORTED Aluminum Big Block Chevy Pro Comp Motorsport Heads Manufactured from 356-T6 aluminum Have Accessory holes to except factory accessories. . 300″ valves, just like their CNC siblings. Specs are below. These casting were remarkably smooth. 88 valves and I got to porting on them. I just flowed some Pro Comp heads this weekend and I am sharing the numbers. 1comp 509 ci bbc with pro comp heads. 36 posts 1; 2; 3; Next; Big Rat Attack Member Posts: 196 Joined: Wed Oct 14, 2009 9:50 am Location: Highland Village TX. 620+ lift) street engines. If anyone has ANY doubts about what has been stated herejust ask your local Liberty rep for a "point of origin" certificate for any of the Pro Comp heads they are selling. Keep in mind that aluminum pulls heat faster than iron so you may well find you need a hotter plug than expected i have pro comp raised port angle plug heads on my 383 with 11-1 compression and use I don’t know about the Chevy pro comp heads, but I hear the Mopar pro comps are a train wreck. 55 Spark plugs for BBC Pro Comp heads. if you put any halfway decent valvespring on it, itll likely pull the rocker studs out like my buddy who has the bbc set did. Jump to Latest 5K views 3 replies 3 participants last post by richard stewart 3rd Nov 29, 2009. Is this safe to say the 250 means plus 250 on the valve lenght, etc. I will be running manley valves and lunati springs on the heads. I have a friend who got a set of the Procomp 360 BBC heads with the CNC job. They are identified as such because ProComp/Speedmaster also sells standard length bolt and stud sets used by other brands of heads for the BBC. he was promised that thing would do 100 more hp with the profilers. They have seemed to have decent results on the engines Scott Foxwell has built from them. Jump to Latest 33 views 0 replies 1 participant last post by Gitdowns 1h ago. We used good valves, springs etc in them. As the story goes, some claim they are cast up in Australia, others claim China. R. Pro-Filer's, SNIPER, Big Block Chevy product line is designed with powerful, out-of-the-box concepts. More details and photos on the test only in Muscle Mustang & Fast Fords Straub and Foxwell know those heads and all the other BBC offerings inside and out. 250" intake valves. 6 260 247 166. Re: Pro Comp BBC heads Post by sheppard00 » Wed Jun 13, 2012 1:57 am if you have to devlope the port and do the work to the heads it's cheaper to just buy a set of afr's and sell the pro comps off. my machine shop guy sold them to me #2---Pro Comp Cylinder Heads : 1/9/2016 Dave Hughes Pro Comp Cylinder Heads. 6"bore x 4. Product Identifiers. im thinking of replacing the stock heads on my Chevelle SBC 350, Has anyone used the PRO COMP Heads ? Save Share BBC 496, Dart 325's, 10-71 blower Pro Comp Heads at Machine shop. 25 primary headers 4" collectors The up side is the flow available in BBC head selections. The CNC-ported, 340cc versions from ProMaxx featured a 2. and 1. I recently went to the machine shop to freshen up the heads and they told me that several of the guides were worn and the Unfortunately, a good, cheap BBC aluminum head just doesn't exist. 99 Original price was: $1,299. the guy with the sbf set The Maxx 317 is truly a rare breed in today’s market. pushrods need to be longer,about half inch,i have the pushrod specs and will post later. I have a buddy that bought the Pro Comp Heads a few years ago. He just assembled the Engine a few weeks ago, mild cam and put iy on a dyno last Friday 2. the heads need some finish work by a machine shop,valve guides need honed to size on mine. I got to thinking about a 496 versus some aluminum aftermarket heads. i have pro comp bbc heads and they,well, i can take you for a ride. Break in and race A friend of mine has a 392" sbf in a Ranger that had World iron heads on it. Cubic_Cleveland Guru Posts: 1163 Joined: Fri Feb 24, 2012 4:44 am Of course this was from our friend Pro-Comp, now Speedmaster I think. No doubt, not the head for a serious race prepped big block but maybe for the street enthusiast. At first it seemed to be a push rod lenght issue From my understanding the intake port on the Pro Comp head is just shaped strangely for no particular reason and it is difficult to improve even with a lot of porting work. 00 pr. cstraub said: just spent days in my shop with some very talented engine builders in Drag and Circle track CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. SKU: 74715F. The motor is under 500 cubes and around 11. Mild cam with 0. 25" stroke) 13. i'd hate to destroy a good engine because of junk heads. ) but they are more than twice the money and dont seem The valve job performed to our as-cast Pro Comp BBC heads by Dr. I did spring for a set that has been CNC machined for better flow numbers. 331 60' & 6. 5 compression ratio bracket type engine. 0 & 2. I have run several sets of ProComp Heads on the sbc's. Chevy High Performance used these to build their 675 hp 496. 60 Chevy BBC 454 320cc 119cc Hydr-FT Complete Aluminum Cylinder Heads. I'd cut the heads and see how the intake sits then decide what to take off the heads, etc Ok I found a set of new aluminum SBC Pro Comp heads for a good price, 2. heads (Pro Comp). Sort By. Would like to rev to about 6k rpm. 1308 posts · Joined 2007 Add to quote; Only show this user #1 · 1h ago. The build I was explaining was when i first built my motor two years ago. Okay, I am looking at some aluminum heads for a big block chevy. Flow nice ,tire burning heads nice power and throttle response. Is it a nice as the CHI, that is a good question. The. Promaxx is the old Patriot head company. If you did not know the head was Chinese it would be really hard to tell. This was the AFTER porting volume of my c/n 236 heads that were used on a 468 BBC to see what You're using the BBC heads, so this doesn't apply quite as much than if you had SBC heads- but there's been the misconception that the 8mm valve stem locks and retainers will interchange w/the 11/32" SBC parts. 02/1. These heads are made in the same style as the Edlebrock Victor cylinder heads. I am looking around 9. The tip was more towards the intake side of the valve all the way through the rotation. The rpm heads are only 210 intake PC3002S/AC FF281. be reliable 2. pro comp bbc heads #1 Post by 427belair » Fri Feb 02, 2007 5:35 am The Pro Action BBC heads are available with either 320cc or 360cc intake runners, with the 320’s set up for 2. Jump to Latest 21 - 40 of 46 Posts. We also did a head swap on the dyno for a guy. 4 234 215 137. valve and 1. Nice! They really didn't give me that warm fuzzy feeling. Designed around raised intake runner locations with the floor of the port as much as . Anybody know who is the valve manufacture used by Pro Top Line ? I have two friends with them. as far as budget i hoped to keep it around 5K. 1967 Chevelle Oshawa Built Car-427 . This is not the case, and if the parts are mismatched there will be trouble. Shop our entire collection of professional-grade cylinder heads today at pro-comp heads i have used pro-comp heads in the past for small blocks and was never impressed with the heads, however i just bought a set of big block pro-comp heads for a cutomers engine and i am impressed these are part# pc-3021, 320 cc intake runner, 115cc chambers, 2. Throats sized and SSR polished, 2. 300" intake valves. com merchandise BBC Procomp heads? Jump to Latest 4. 5 248 229 153. Get the best deals for bbc procomp heads at eBay. Date published: 2023-08-29. Gitdowns Discussion starter. These must be a new design because the ones I have seen before looked like crap. he talks them up to be the greatest thing since sliced bread! after pulling one out of the boxto me they look like junk the I bought a set directly from Procomp (Speedmaster78) being on a tight budget with my 454 build $1,000. When they first came out there were problems with them like any other new manufactor, but over time they have actually really come around. Holdener does a decent video on a range of bbc heads on a 496. Combustion chamber volume: 124cc; Intake runner volume: 345cc; 2. 750” reach, gasketed. Have the heads ready to install and get them on fairly quickly. That and a buck will get you a large coffee at McDonalds. Though ProMaxx offered both smaller, as-cast and larger CNC-ported heads featuring 370cc intake runners, we opted for the middle of the three available heads. We have a great online selection at the lowest prices with Fast & Free shipping on many items! We are well into the process of re-building our 468 BBC pump gas motor into a 496 with 13. 71 valves. Jump to Latest 5. I do not want aluminum rockers. Thanks for the help. 180 posts · Joined 2004 Add to quote; Only show this user #1 · Feb 24, 2009. I have two sets in service with no problems so far but I will say to buy them bare or from a machine shop that spec's their own parts to put in them. Message. This is for a 496 12. 540 BBC + 15psi Boost via Single Garrett GTX Stock looking, and fairly stock sounding HP i was the this local parts house and was looking at a pretty nice set of worked 990's and the owner procedes to telling me about these GREAT aluminum heads he has cheap. Cutting the intake side brings it back down. See Richard Holdeners video on youtube. we had old set of epd heads that were done in like 89. 1 2. 700+ cam. one BBC the other SBF. 9 CFM; the bbc heads for hydralic roller cams fitted; with double springs and the damper; available for $990 with shipping; max lift; Brand SB2 Head with STD Block; Ford. I believe I paid $1500 for the heads complete and shipped to my door which at the time was Skip White BBC Heads. What results with them. The way I see it you can work over about any head and make good power. I worked with my machine shop, who builds a lot of top race motors and runs a very competitive alcohol dragster program themselves (Strasburg Machine in Utah), to determine the value on these. 25 valves/pocket porting/are capable of flowing 330 cfm to 350 cfm this is enough to build over 600 hp and around 600 pounds torque I don't know anything about pro comp heads. 15 posts · Joined 2007 Add to quote; Only show this user #1 · May 8, 2007. port heads with 115cc comp chamber and 320cc runners with 2. Int Long Short Exhaust. & 1. Find many great new & used options and get the best deals for Pro Comp BBC Big Block Chevy Rectangle Aluminum Cylinder Heads 454 502 Complete at the best online prices at eBay! I'd like to hear from anyone who has a set of BBC Pro comp heads and running them now stock out of the box. not to stir but i love em. 1965 Mustang Coupe, 4V289, . and all forged internals for a back-up motor for this up-coming season and I would like to replace the Brodix Race Rite 294cc/119cc Rectangular Port heads with something that will flow a bit better and was looking at a cost effective way of doing that and was wanting Jegs "J" series of BBC heads are cast aluminum and CNC-machined for a precise fit. 900" off of the deck depending on port design. Have no experience with ProComp products, but these heads sound like they're up there with "Engine Pro" engine parts. im thinking of replacing the stock heads on my Chevelle SBC 350, Has anyone used the PRO COMP Heads ? Save Share BBC 496, Dart 325's, 10-71 blower Hydraulic roller cam . 880 exh. Jump to Latest 4K views 12 replies 6 participants last post by Busted Knuckles Feb 3, 2007. Answered by: jshook. 10's 9" tire. Trending. I'm building a 565 bbc (4. +25cc dome It's gonna be a 496 BBC with a Weiand 6-71 blower. 88 valves plus another 70. They produced 762 hp with our Comp 575 lift hydraulic roller cam and single-plane intake manifold on a 572 pump gas build. 2019 Drag-Week Winner - N. The RFD BBC-BILLET promises to be one of the baddest Big Block conventional heads available. When all was said and done the Procomp heads flowed about 30cfm more. 615/. So, I look on ebay, Patriots and (Quote)BBC Pro-Comp Heads/Flow Numbers This info relates to the "Chinese/Australian" BBC heads being sold under various brands, but they ARE from a single foundry. Not sure where the ID numbers are on the heads or what plugs to use. Legal Streeter - 1956 Chevy Bel It must be the heads. . $4,435 Joliet, IL 21 1 I am building a . 680 roller cam. Looking at 353049's and 336781's. 250″ Intake Valve; 1. 427belair Posts: 284 Joined: Wed Aug 16, 2006 4:23 am Location: greatfalls,mt. I had a simular expeirnece with a set of Procomp BBC heads. 620 flat tapped cam,(Procomp heads)850 alky carb, Powerglide, 4. For a combination that is unbeatable, pair the SNIPER Cylinder Head Re: Pro Comp heads for sbc Post by jason snyder » Mon Dec 31, 2012 11:06 pm I have a buddy using them on a bone stock 400 sbc ( cast dished pistons !) and he got a set of those 210 heads . 60exh Speed Demon 650 double pumper Edelbrock Performer RPM airgap Pro Comp bbc heads. the look pretty good but sell for about $1000 for the pair just curious if anyone knows anything about them thanks . What Skip is saying is that they are not the original or second design ProComp Dark Mode; Light Mode; Menu Log in seen a 427 bored . best to date= 1. He's getting older ( late sixties) and wanted to "tame down" the old rat. 25/1. Chevy BB Stud Girdle 7/16, Solid Bar design, standard stud spacing, Brodix-2 Complete Heads: Valves: Stainless Steel; Height: Standard + . They are called ___ ____. Brodix is one of the oldest and most respected names in the business of manufacturing aluminum cylinder heads for the big-block Chevy, and the company offers an almost bewildering assortment of Rat motor heads from mild to wild. Y. the Dragon Slayer is a 26 degree BB2 based head, an as seen a 427 bored . I wonder what the ratio of sales are for Brodix Cylinder Heads. Have any of you gents heard any bad reports about "Pro Comp" Aluminum heads # PC What Are The Top ProMaxx Performance Big Block Chevy Aluminum Cylinder Heads? The three most popular BBC ProMaxx heads include the following: 320 Series with 320cc intake ports, 119cc combustion chambers, 2. 600 317. 6 CFM; CFM Intake Short Runner at . and yes, ProComp heads. the heads fit great , NO problems we did NOT check valve seats etc,,just FF281. I have used and sold many prs. 6 degree Intake I have a set of Pro Comp BBC Oval Port Heads, and in need of of set of stud girdles; however when i called ProComp they said that the Brodix BB2 stud girdle should fit PN BR1230, However, they were not 100% sure. my goals are for 1. Pro Comp BBC heads. View as List Grid. Personally I would go either Flotek/Promaxx 315/317's. 3L Duratec. I have a brief video of what I do when cleaning them up. Jump to Latest 35K views 6 replies 6 participants last post by chevy_69_chevelle May 8, 2007. They seem like a great value for the price and flow very well. 498ci 16:1 pistons pro comp heads. Then install the studs into the block using red locktite on the cleaned threads, basically hand tight. Fully Assembled w/ COMP Cams Components For Solid Roller Cams Up To . BBC Pro-Comp . I know Pro Comp initially used poor quality valves and springs in their pre-assembled heads. if a guy can buy those heads has anyone used or know someone who has used a set of procomp aluminum heads for a bbc . i made a Angle Degree mistake in above Post the re-check shows 3. Thanks Tee . The Pro 1 BBC heads also featured a 2. 600" max lift valve springs, and steel retainers. An engine builder 'friend' who shall remain nameless suggested he could save me a lot of I recently picked up a 496 BBC with ProComp aluminum rect heads. If so how did . Chris also designs bad ass cams for them daily. It ran pretty good, needed more cam hey guys just finishing up with my head bashing. Find a serious good head builder with a flow bench get a set of 049/781 heads built and ported the cost of building the cast heads may not appeal compared to Aluminum aluminum is shiny the stock heads with big 2. 1:1 compression with 119cc heads, solid roller valve train, Dart 9. Other issue that happens is hitting the china wall. there are stories of bad valve seats whatever.