This custom Trans Am Oringinally came with a 403 big block. Since then it has been converted into a 455 olds motor and has great street / strip potenial. With a dual clutch posi rear end with 4.11 gears and a Borg Warner high performance t-10 transmission.
The shaker was a problem in making it fit corectly considering the deck is alot higher on a 455 than it is on a 403 motor. But when it was all said and done its what bring the car alive.