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Just bought a 1975 Pontiac Firebird (formula 350) not original engine, it has a 400 (big block?) ID #SR88576 - tried Wallace Racing and no match. Heads are 13, which are from a 1970 300+ HP rated engine. Would like to know what I
'm working with and if it's worth the rebuild.
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77' Pontiac Lemans 80' Pontiac T/A 75' Pontiac Firebird in pieces |
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