My clutch shop in rochester here said that Many bellhousings have been decked perfectly flat by machine shops. But not much to shave off before causing other problems. If youre block is not square , then either you should reblueprint Or i guess shim ..
I have the 383 for my stroker in getting some work right now and I'm having the shop kiss the bellhousing surface to make sure it is parallel to the crank line since the block was either align honed or align bored , don't remember which.
If it's not square then I know it's the bellhousing and I'll deal with it .
