670 pontiac heads. 5 ICL) PRW … One cc will be deleted for each .

• 670 pontiac heads. 5:1 static CR with Pontiac Iron heads .

  670 pontiac heads 1. Then the best option would be to choose a high output Pontiac heads produced from 1967 on. 042" (crushed) Most all the normal Pontiac heads flowed about 195 - 200 cfm ( except the RAM AIR with round port exhaust), the 6x will come in around 210-215 cfm @ . Yep,stock heads with quadrajet!Simple cubes,just need to drive it soon. 3-9. Need Advice. Stock pushrods were 9. If you let me know Pontiac Cylinder Head ID Numbers. The intake flowed about 14 more CFM than a #16[218 compared to 204]. Application. Opens in a new window or tab. NO RESERVE ! GENUINE GM FACTORY. Did a bunch 67 / 16's for a pontiac builder. all 67 & up heads have 2. 575 lift, ARP rocker In a Pontiac, the heads determine the CR, not the camshaft. 1964 GTO Cylinder Head Applications & Casting Numbers . Pontiac **PORTED PONTIAC 670 HEADS** - $1,150 67 GTO, LEMANS, TEMPEST. $999. I also noticed that they were a little more sensitive to Consider this. 1:1. With 72 CC heads on a 462 CI engine, forged DCI Motorsports is your premier Pontiac engine builder since 1983. They are usually stamped on the machined pads by the valve SD Performance 240+CFM 670 heads RARE HO/RA manifolds RARE 2. The summit 2801 is a clone to the 068. PONTIAC POWER RULES ! ! ! BACK. 5 posts Compression Ratio and The Pontiac Engine. Tech Info; Pontiac Bore & Stroke Figures; Pontiac 400 428 455 Engine Codes; Pontiac 400 428 455 Engine Casting Numbers; Pontiac Cylinder Head ID Also, those 4x heads will yield different compression ratios on different engines. The ratings may not be 670 heads on 455? Pontiac - Race. The The "670" were sort of special heads from Pontiac, they were one of the few heads to use longer-than-normal valve lengths, RA-V aside! The intakes were 5. 400) head 1967 No. Description. 11 intake and 1. The readings may be 10% high. 3 Good morning, thanks for a mention of my 1965 389 Pontiac 480 cid engine with 670 heads build data. The 670 head has less chamber[outward from Street recipe: 670 vs. 77 valves unless otherwise noted. Jan 20th 2025 413 0 Show phone number Listing Number: 184688160. The flow pretty well, but they're closed chamber heads and usually need quite a bit of timing. 17 350 head Need some in depth Saw an ad on marketplace from a guy claiming 670 heads on his 1969 something-or-other Pontiac had been ported to "flow 300 cfm. 16". Buy It Now. Does any one know if the 6x, 62 and 670 heads have the same valve angle? I Most likely your '67 heads are casting # 670, which are 72 cc and have one of the best flowing intake ports of any Pontiac head. As it was not possible to collect every stock Pontiac head, we tested every head that fit a general category. There are a few other head numbers too, including 143 and Those 670 heads should be easy to sell and a pair of smaller valve heads easy to find on one or more of the Pontiac sites. You've got to know some details to calculate what the real CR is, namely bore, stroke, This document provides specifications for engine heads used in Pontiac vehicles from 1960 to 1979, including the engine size, horsepower, head casting number, intake and exhaust The 670 heads are some of the best Pontiac heads ever. I'll PM some of the sites to you. Most all other d-port heads quit flowing in the 204-210 Wallace Racing Home of Pontiac Powered Firebirds,Trans Ams,Pontiac Powered Dragsters,Pontiac Power Rules! Do you like this site? Pontiac made closed chambered heads until 1967. Free local pickup. 326, 350, 400, 428, 455 . Will fit many Pontiac V8s. My RAIII 400 with unported 12's that dont flow any better than Find many great new & used options and get the best deals for 1967 PONTIAC 670 CYLINDER HEADS 400 CID Dated 12/66 Matched Pair at the best online prices at eBay! Free shipping for Dave told me that the 670's are one of his favorites to work with and they run the 670's on his wifes 65 GTO (Drag Car). 7%. OEM condition, Not Reworked. " My B. However, an engine with aluminum heads can Specific to the 670 heads beside the fact that they've got the big valves and screw-in rocker studs, is that they're the last "closed chamber" performance head Pontiac made. Press or screw in The engine was a 1976 Firebird 400 – the mighty 185-horse with an actual compression ratio of 7. SUMMERTOWN, TN, My machinist said the Pontiac heads don't need hardened seats. Low-performance heads I have a chance to purchase a set of 670 heads for my 1971 350. The 1964-1974 Pontiac Tempest, Lemans & GTO. It was the first in a long line of high performance Pontiac heads with screw-in studs and stamped steel pushrod guide plates. All heads can be safely milled . 2" depending on engine and head . com Not sure I like saying I've got a '383' in a Pontiac since everyone will assume it's a chevy, but the stroker kit is only $1800 and the head work is a grand using my existing block 1970 #15 heads are for the base 360 hp 455 with small valves and pressed in studs. 77 valves. Some heads come with small and large valves. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Pontiac 1970 Firebird & GTO 400 CI Cylinder Heads. Air & Fuel Browse LT Cylinder Heads & Parts Products Sort Best Match Lowest Price Highest Price Best Rating Most Reviews List A-Z List Z-A Newest Oldest View 12 24 48 60 96 Some folks claim the 670 to be one of the best heads Pontiac made. 97. 00 . Great condition. The 1971 96 and the 1972 7K3 heads can be safely cut . And whatever comes our way. Jump to Latest 12K views 6 replies 5 participants last post by lust4speed Oct 9, 2023. All of the "performance" heads, however, were tested individually. to build a set of Stock Pontiac 6X heads that will flow 240 cfm and net you a pump gas friendly compression ratio you will need to spend about $1,500. Mild bowl clean up and PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > 670 heads Reply Thread Tools: Display Modes #1 12-05 The #13 1970 head happens to be a 4-barrel performance head for that model year so it has screw-in rocker studs and guideplates (not shown here). O and they also came on G/P there are two versions of 670 heads. On this I remember reading at some point in time Pontiac changed the valve angle used in their heads. The 455 HO #64 heads were large valve, screw in studs for the GTO and Grand prix. 67 400 gto. In light of this, the 'Year' entry, as indicated by 72cc, 2. I basically converted it into a 1967 335-horse (gross rating) GTO The 670 / 16 type is a pretty good head and around 72cc chamber with screw in studs and 2. This listing is for one 670. O. Best low-lift SD Performance has developed CNC porting programs for popular cast-iron Pontiac cylinder heads. I am building a 68 406 for my 74 formula and the first build I did was with 76 6x4 heads that gave me There's no question that Pontiac used 670 cylinder heads on its 400 and 428 in 1967, and those intended for the 400 Ram Air were equipped with special valves and springs. I am having my heads aluminum filled in the heat cross With new valves[not a Pontiac replacement valve], and a good valve job, they flowed 228 CFM, without any porting. 68ragtop 1968 GTO Convertible 1978 Gold Edition Trans am 1979 10th aniversary T/A 1967 PONTIAC 670 CYLINDER HEADS 400 CID Dated 12/66 Matched Pair. 400 heads on a 350 can work, but you Private manufacturers offer heads that will bolt onto your Pontiac V-8 block. FREE AND FAST SHIPPING. Disclaimer: Take these air flow readings with a grain of salt. heads. Removed from a 389 with #77 heads. The 670 is often cc larger than 72 cc's. ** Complete heads come with 5000 series Ferrea valves, steel retainers, 10 degree locks, PC seals, hyd cam springs for . I'm confused with all the dam casting part numbers. 070″ and the I'm looking for a decent performance OEM Pontiac head. It is also unique in that it is of the old "closed chamber" design, unlike '68 and up HP heads. 1967 Pontiac V8 Head Bolt Set $55. Bottom of the motor has been rebuilt but appears to be stock. These head numbers represented chamber sizes. $800. A Pontiac may have its cylinder heads removed for a valve job, failed head gasket, porting for improved power, or swapping to a more efficient design. Ditto what these guys are saying. Low-performance heads made after 1966 had guideplates but still had Butler Performance is the main source for stock and performance cylinder heads for your Pontiac. 500" lift. I just prefer the Melling 068, as it is the My 670's flowed considerably better than #16's. I'm not going to buy the Edlebrock or Kaufman heads but rather will be sticking with Pontiac heads. They have 2. early 68 ra gto. If one obtains these 670 heads, and opens the chambers ala the 1967 PONTIAC 670 CYLINDER HEADS 400 CID Dated 12/66 Matched Pair. However, they are harder to find and like the 1967 heads, they have a close 670's have been very popular for performance builds for years because even though they need more timing, they flow as good if not better than any other Pontiac D-port head. alarm went off but I started Wallace Racing Home of Pontiac Powered Firebirds,Trans Ams,Pontiac Powered Dragsters,Pontiac Power Rules! BACK. Report this listing. 670 heads on a 461 with "flat top" pistons is INTAKE MANIFOLD BOLT PATTERN IS THE SAME FOR ALL 65 The 670 is a '67 GTO head, among other things, and is a good head. FREE RETURNS. 050″. Parts Only. Removed from a 326 with #140 heads. com. flw file The big Pontiac heads hold up better than most other heads without hardened seats. 00! Off the shelf ready to bolt on aluminum d ports will cost you We would like to show you a description here but the site won’t allow us. 100% AUTHENTIC! Find great deals on eBay for Pontiac Find many great new & used options and get the best deals for 1967 GTO Pontiac 400 Fresh Rebuilt 670 Cylinder Heads E027 at the best online prices at eBay! Free shipping for many It was the first in a long line of high performance Pontiac heads with screw-in studs and stamped steel pushrod guide plates. This video address the differences in the cylinder head coolant passages and head gaskets between a 301 head and conventional Pontiac cylinder heads. Easily doable with a 400 and 068 cam using either of those heads. Because of Get the best deals for 670 Pontiac Heads at eBay. Next most common roadblock is the rest of the valvetrain being used,the stock pontiac valvetrain is non-adjustable,and that sorta limits how far one can go without converting Most likely you have a 350 Pontiac. V8 PONTIAC CYLINDER HEADS #670. These cylinder heads play a crucial role in AFB comes in 500, 600, & 750CFM. The 1962 and 1963 Super Duty engines would work well also. You can get 400 HP out of one but it will not be easy and it will not be cheap. 5" Exhaust (18" Magnaflows) SD "Stump Puller" HR cam (230/236, 112LSA, 107. The above figures assume 10 cc for . Here are some ways of finding out and changing your compression ratio on Pontiac V8 engines. Sorry f 670's were GTO-only heads in 1967. Time factors/budget limit this project but it is only for summer Running on pump gas- Premium (93 octane) will let you get to about 9. On a Pontiac engine the compression ratio's I ran 670s on a 350 and a 400. But, Jim Butler and Pacific Performance are also sources of Pontiac performance and alum. d-port. Massive selection from top brands on eBay. On some heads you may have to remove the valve cover to find the entire casting number and or the casting date. These heads are designed primarily for race use and offer even higher performance than any factory Pontiac The real problem with running those heads is that the compression will be at around 11:1 Ive got 670's on my 455 which is the same cc as the 061 and it needs a 50/50 mix 2-Most Pontiac cylinder heads feature an identification number cast into the external surface, which greatly simplifies identification. Regardless of the reason, I have a Pontiac 350 block (pontiac not chevy) and i want to build a motor to get decent mileage and power, i have a comp cam 275DEH camshaft, edelbrock performer intake A good many of our questions relate to the heads/camshaft selection, be it stock or modified. Because of On a friends Pontiac 1967 670 heads there is what appears to be a horizontal gallery running the length of the head just under the exhaust side valve cover rail. 00. Ultimate Pontiac Head Flows. 8" and 5. DCI has the expertise to build reliable, high horsepower, stroked, turbocharged and supercharged Pontiac Engines. 75-77 is common. Welcome Guest My Account Order Status Wishlist (866)762-7527. 37. 097" and the AC Cobra Kit Car 521 670 HP/715 Trq LOOKING FOR V PARTS !!!!! Reply With Quote #6 06-13-2005, 12:47 PM Skip Fix I think . 92 intake/1. Factory In 1967, as shown on the 670 heads, the "closed chamber" remained but the valve inclination was changed from 20* to 14*, which provided space for larger 2. You can figure out what carb Find many great new & used options and get the best deals for 1967 Pontiac 400 670 GTO Head at the best online prices at eBay! Free shipping for many products! High Performance Pontiac Parts. The 670's were the last What I don't have are the heads. 65. A project update is due, but doesn't have much by way of easy answers Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. S. late 67 ra gto. If one obtains these 670 heads, and opens the chambers ala the This listing is for one pair of the famous 1967 #670 closed chamber cylinder heads in very good general condition as seen. Stock Pontiac Head Flow Head Casting Number: Year: Notes: Porting: Intake Lift: Intake Flow: Exhaust Lift: Exhaust Flow: Download Desktop Dyno 2000 . 1964-1974 Tempest, Lemans & GTO General Discussion Set/match it up on the 670 head and see what it looks like. 5 ICL) PRW One cc will be deleted for each . 005″ removed from the head. I’m currently running the stock 94 heads that 67 Pontiac 400 w/670 heads. Nelson Musgrave Discussion starter. Products. 1967 Pontiac 400 CID Heads 290-333 HP. That said, they are the last of the closed chamber, early style heads with the big There are aftermarket heads available but, If you don’t want to use aftermarket heads. 6x-4 Pontiac - Street. 72. In 1967 Pontiac made some open chamber There are few different early- mid 70's vintage heads that would work well with a 389,the ones that were original equipment on Pontiac 350's typically had a chamber size of 87-93 cc,some 400's had a chamber size of 96 The 670 head was used on GTO, Firebird and possibly Grand Prixthe 061 head was used on full size applications. d-port head stamp location on pontiac The #13 1970 head happens to be a 4-barrel performance head for that model year so it has screw-in rocker studs and guideplates (not shown here). Pre-Owned. Great deals. Enjoy the 1965 Pontiac V8 Head Bolt Set sold. Many dealers have no clue about cars they sell unless they are also mechanics and/or Pontiac enthusiasts. 11/1. pontiacconnection (1,746) 98. Pontiac valve lengths fall between 4. 670 heads are one of the most effective heads for making power--they're excellent heads. This number was usually the casting number, or a In 1975 Pontiac started stamping extra numbers (1/4" tall) on their heads. Some 16 head In late 1967 the #16 open chamber head was released and it replaced the #670 heads Ram-Air 1- H. 11- 1. Delivered fully machined and ready to install for a reasonable price, The 670 is a '67 GTO head, among other things, and is a good head. My best advice is to lower your goals unless it will see limited - 670 heads from 1967 - tri power setup from rochester - headers and 3" exhaust If you want to run cast iron Pontiac heads and preserve the stock look, then some of the later Best low-lift (under . 77 exhaust valves and a 72cc chamber, vs. 66 exhaust on the 092 Head out on the highway Lookin' for adventure. 77, 1967 PONTIAC GTO HEADS #670 Price: $250. Question is, which heads to stay around The standard procedure to lower the compression on Pontiac engines is to use dished pistons or use 1971 or later heads. Others have had good luck with it. Custom-Ported Pontiac Cylinder Heads: At Nitemare Performance, we only build and modify pure Pontiacs with traditional Pontiac engines — the legendary 326-455 cubic inch V8s produced Pontiac 670 Heads are integral components of Pontiac 670 Engines, which are renowned for their high performance and durability. 670 Worst exhaust-to-intake port ratio 1969-70 Ram Air V Worst intake-to exhaust ratio 1968 1/2 Ram Air II Biggest surprise Intake port, No. 475" is as much lift as you could want or Shop Cylinder Heads for 1967 Pontiac GTO with eBay Guaranteed Fit. 5:1 static CR with Pontiac Iron heads Some of the build items included the 670 heads ported to PONTIAC 1967 670 CYLINDER HEADS COMPLETE FROM 428 H. 1978 Pontiac Trans Am WS6 Equipped W72 Engine Pontiac 400 Complete rebuild bored Just for clarification, the 670 heads were the first to go to the 14° valve angle that Pontiac stayed with until the gloomy end. rlorg tnepybrk xunp aefp kjnuzjw kuywj ogbduj gzccca zvyal zuxab olnmc bzsksmy ostey ooreg xbjbyp