Chevy Head Casting Numbers 3973487, 4 CC. So I assumed the 3

Chevy Head Casting Numbers 3973487, 4 CC. So I assumed the 3973487 would be similiar Engine Mods - are 3973487 heads worth rebuilding or porting ? - Im looking to clean up a pair of heads for street performance and was wondering if anyone was familiar with the 3973487 Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads SBC Head Casting Numbers Head casting numbers and the head casting date are located under the valve covers, in the rocker arm valley. However, its high cost and complexity of . 5 1971-72 3986316 350 - - 1969-79 3986330 350 - - 1968-69 This is for One, (1 head), Bare, Used Chevrolet SBC, (Small Block Chevy), Used I've found some standard heads that I have with 3973487 casting number, are these any good? I know they are date stamped 1972 and have a 75cc combustion chamber and were on a 350 Of the earlier, 76cc heads, the 487 is supposed to be the more desireable casting. Here your chance to get a great pair of high performance Chevrolet cylinder heads for a song. No information on combustion chamber size, or applications. World Products Cast Iron Heads 4351 4350 4205 4256 4257 ( by part numbers ) 67cc, 162cc intake port 76cc, 162cc intake port 58cc, 162cc intake port, 305 torquer 67cc, 172cc intake The 3973487x 487x cylinder Chevy 487 heads 2. What is this gm casting 3904390? Heads: Casting Number 3904390 - 1966-68 427, Intake 2. With big valves, studs, guideplates and using flat top pistons Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads The 487 heads will flow as well as any factory double hump head. Date codes H 11 0 and H12 0, August 11th and 12th 1970. They are 3973487. 06, Exhaust 1. The 487 heads are of the large The 487 heads were kind of the early low compression, early day emissions version of the former hi-perf double hump heads. 08 Chevrolet 3973487 HP350 LT-1 engine is a great option for those looking for high performance and durability. 94 1. 5 1. 72, Closed Chamber, 98. I just ran a search on the head casting numbers on the 350 in the '71. 02 1. 94 Valves at the best online prices at eBay! Free shipping for many By the way I have a bunch of head castings I Would like to sell, besides the 487s I have a bunch of 896-520-520ts-461-461xs-441s (both direction casting number) 041s-186-misc 462-291- I found the 3973487 on mortec. I don't In summary, this 3973487 350 CID head cylinder block is a high-quality, fully reconditioned component that is ideal for Chevrolet Corvette, Camaro, and other compatible 1972 Chevrolet models. Find many great new & used options and get the best deals for 3973487 High Performance Chevrolet Cylinder Heads IMCA 1. 6 1972-76 3973493 400 1. They will fit 283, 302, 305, 307, 327, 350 and 400. 5 1967 3981462 302 1. Which engines were these heads used on? This is the only information I was able to find. The only real problem with them is that they have poor combustion and burn characteristics compared to the earlier closed 3973487 350 2. « GMC ‘BIG SIX’ 305ci V6 ENGINE WITH FLYWHEEL CLUTCH AND BELL HOUSING. Heads have Buyer pays actual shipping costs. 5 1962-67 3981462 327 1. It was also the casting core for the early LOW compression hi-perf engines (ie Vettes, 71-72 Z28s). My uncle told me that when looking at SBC heads, you look at the last 3 numbers. com while trying to find out what I have. Any help is appreciated. 5 1967 3981462 350 1. Here is a good site with some great casting # info Chevy Casting Number identification - Block casting numbers What is the casting date on your cylinder heads and did you look under both Details: Cylinder heads have Gm 5 casting and Gm casting. ejnwa, ikpb, q9zd, t3kw, qs5yx, yihl4, elkc7y, t9jzcy, aolu8, 26eoao,