I have a brand new crate 350 SBC and 700r tanny with a ford 9 inch rear end in my 1946 Chevy panel truck. It has a new exhaust system, and a new aluminum hot rod radiator conversion for a 46 chevy truck. My friend just bought a brand new 540ci engine for his 72 Chevelle and wants to give me his 1972 Chevelle's 454 and th400 tranny. The old motor was recently "gone over" and updated with solid lifters for the resto-mod he was doing when his son talked him into buying this new 540ci. The new engine goes in, and he is offering me his old refurbished engine and tranny. I'm thinking it's a generous offer - but now I'm wondering what will I have to change to put his engine in my 46 Chevy truck? The fire wall on my truck was moved back to make room for the 350. A cross member was removed to make room for the 700r tranny. The frame was boxed. Will I have to weld new engine mounts, buy a bigger radiator, exhaust system? Will the Ford 9 inch be okay, new drive shaft? God what else am worrying about that I don't have to, or what else should I be thinking about? So is free really free? I'm thinking of passing on the offer - should I?