305 to 400, What needs to be done???
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Joined: Sep 2009
Posts: 414
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From: wisconsin
Car: 1992 Pontiac Firebird Base
Engine: 305 TBI
Transmission: 700r4, B&M shifter & shift kit inst
Axle/Gears: 3:23....10 bolt
305 to 400, What needs to be done???
Hello, I am thinking about getting a running Pontiac 400 engine out of a 1973 GTO and was wondering what, if anything i wud need to do to my car, like change my mounts or change my tranny/differential. Would everything still work like with my 305? ALL I NEED TO KNOW IS WHAT CHANGES NEED TO BE MADE...THANKSSS
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Check the Pontiac V8 swap sticky in the top section of this forum.
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