Thanks guys, I think you have swayed me, I`ve been on the fence on this for some time, my `37 runs a 406 sm blk now, 461 heads 202/160 stock bottom end just everything gone thru, 22 cc dished kb pistons, with sealed power rings, clevite bearings, cam is mild 450 lift 221 duration with 1.6 rockers, performer manifold, holley 670 dejetted 2 sizes, unilite dist, I know how this thing pulls, and I haven`t yet reached the end of the torque band on it, so I`ll build the same only bigger, one mistake I did make was the wife, yes she`s into this as well, she wanted a ( her version of it ) winer ...... gear drive in it, ok so to apease her I put in a sig erson fixed idler drive, lesser of the two eviels, well you can`t here the radio at 50 or above, so that won`t happen again. so far I guess what Im looking for is a 4 bolt but not to important, rectangular heads if I want to spend more money, but not really needed, any differance between pass high performance blocks vs standard....? and what if any advantage from a tall deck to standard deck block...? steel crank a plus...