I need some advise. I am building a 383 SBC and have been for some time now. It has been a nightmare but I am finally optimistic this attempt will work out. It has been line honed and after two polishes on the crank I am getting .003” of clearance on my mains. I am reading this is potentially too much for a street/strip motor and should shoot for around .0015”-.0025” to keep the motor running for as long as possible. I also have a Melling Select HV oil pump…will this compensate slightly for the big clearances? I am running $65 Clevite H-Series main bearings and while they offer these in .001” undersized versions I would hate to throw away $65 for the standard set. Run it as is? Get .001” bearings? Turn the crank .010 and buy matching bearings (in which cast the Scat cast crank wouldn‘t be worth it and I would want to go forged? I need some quick help as I am also possibly moving away from my car soon.


Hi all! First post and all but trying to find dedicated SBC gu-ru's.