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#1
10-21-2025, 02:19 PM
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77 Trans Am 400 to 455 engine swap
Greetings, New to the forum
I'm needing info on how difficult it will be to exchange the Pontiac 400 to a 455. since the 400 6X8 heads will bolt on I'm thinking the 455 block should drop in with the exhaust and transmission mountings will all fit, is this correct or will I need to change a lot? also if I need more info perhaps links to those in the forum to learn whats needed Thanks all...... |
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