olds 455 in a 71 lemans? - Pontiac GTO Forum
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post #1 of 2 (permalink) Old 09-19-2017, 12:47 AM Thread Starter
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olds 455 in a 71 lemans?

hey total newbie to the classic world and i just bought a 71 lemans with a 350 thats been sitting for 20+ years. just cracked open the motor to find one of the cylinders was rusted out. did some digging and found an olds 455 with a 400 trans. will it fit or will i need to find a custom mounting kit?
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post #2 of 2 (permalink) Old 09-19-2017, 10:02 AM
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Welcome to the forum. '68-69 Olds 442's w Olds 400's & '70-72 455 equipped Olds A bodys took different engine frame mounts than the two styles used in '70-72 Pontiac A-body's. Engine wiring harness is different. Olds also used the W-Z exhaust manifolds for chassis clearance in '70-72 455 A-body's. my best advice would be keep on watching for a Pontiac 400 or 455, something that is a bolt in (pre 1976) & once installed doesn't hurt the value of the LeMans.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Projects, Barn Finds & Restoration Discussions

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