sm465 to th400 swap

[Jay146992]

I have a 1979 k10 reg cab short bed with a sm465 transmission that I want to swap to a th400. I know the 465 is 10 spline and the 400 is 32. I already have a 400 trans and a 32 spline np205 tcase but my question is what will I have to do to make it all fit on the chassis. Will I need to move the cross member? Is there a difference between a 4x4 th400 and a 4x2 th400? (I have no idea what the 400 transmission I have came out of) The np205 32 spline I have has a long tail shaft unlike my other np205 that has a short shaft that was mounted to my sm465. Will I need to change the tail shaft on my tcase? Did chevy make a 350/th400/np205 combo? I would really like to know so I don't have to make custom drive shafts and a cross member. Is the 400 transmission suppose to mount to the cross member or is the tcase? Also what gear ratio would you guys recommend for 0-60 drag? 4.10, 4.11, or 4.56? The engine is a 500 hp 383 stroker and it has 35" tires. What front and rear end should I get? I was thinking a dana 60 combo. It currently has the stock 10 bolt front and 12 bolt rear.