Chevy 350 / gerdy is a four bolt main block

[@phillipthethird42]

Looks just like the one that I found. Except, I think mine is a little dirtier .

[@robertdurant6003]

here's a useful piece of info. any 350 with the original 8 inch balancer is a 4 bolt main. guys make alot of assumptions about how to tell a 4 bolt but the balancer is the ONLY way to tell.

[@waynedavidson2691]

Thanks Robert for the info