yeah pretty much, i checked it out today, yeah that bolt would have to be long. i thought it was lower in the head. i have never built a small block chevy, mostly import 4 cylinders and v6 for independent dealers when they buy screwed up cars from auctions, and that was years ago now. so i am learning about what can go with what, a friend of mine dug out a 350 4 bolt main he had cleaned years ago today for me. i have to go look at it.he said it is pretty rusty now so i will have to go through it all again. i have 30 over pistons so i will get it bored most likely. they have the junk yard filled with clunker trade in's so maybe i will check some out this week and see if i can find any vortec heads, i will get them real cheap. they put liquid glass in them to sieze the engine. it should be ok for the heads still. i'll find out this week.