On my truck I have now I've replaced entire driveline peice by peice over the summer. 4 bolt 350 block, steel crank, pink rods, K.B. pistons, 9.5:1 compression, 264 Isky mega cam, 64cc double bump 2.02 heads, performer intake, custom calibrated 850cfm Quadrajet, Headman headers, dual 2 1/4in exhaust. C-4 corvette 4L60 tranny, stock driveshaft. Ford 9in rear end 3.25 pozi shortend 4 in each side. 235/50/15 front tires 265/50/15 on 8 1/2in and 10 1/2in aluminum slots Ran high 14's @ 110mph in the quarter by september. Still building....ladder bars, stronger 700r4 tranny, quick ratio steering box, roll cage, blazer gas tank, aluminum heads, body work/paint....ect,ect.