I was loading up a bunch of stuff for scrap and was looking at the 350 with 2 spun main bearings. I was gonna ditch it. But I rememberd something about a 400 crank has .200" bigger mains. And to build a 383 the mains will have to be align honed .200" over anyway. Correct? I haven't done alot of reasearch into building a 383 and I'm just checking to see if tossing a block with spun bearings is a bit hasty.