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Does parts from a 1970 Pontiac 455 engine bolt onto a 1976 Pontiac Engine like heads and manifolds?
Plummer70
Yes engine was changed very little over it's life. One thing to watch out for, the 1970 cylinder heads will raise your compression to 10-10.5:1 which is too high to run on today's pump gas. The casting number 64 heads were the best 455 heads in 1970, they have 2.11 intake/1.77 exhaust valves and 85-87 cc chambers. They will give you about 10.5:1 compression, if you have acess to 95+ octane fuel they will boost power and milage over the anemic 7.6:1 compression of the 1975 455 Pontiac.
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