440 Oil Pressure Issues..

I have no idea what to tell him except his small pan smash didn't cause his issues.

I will say that I've had a thrust main take a **** and slowly loose oil pressure until it was at basically zero. And it didn't make any noise either.

So that may be something to look at as it's easy to check. But his pan to pickup clearance isn't his issue.

The thing about both big and small blocks is, oil pressure is VERY EASY to verify. Distributor out, intermediate shaft out, NEW, GOOD manual oil pressure gauge installed in the engine, oil pump primer shaft installed in oil pump and give it a whirl. You can't "be 100% sure" of this, that and the other thing, but until you've done that, you don't know jack dammit, yet so many people just slap REFUSE to do it, and it's SO easy. Just makes ZERO sense to me. I've seen crap get hung up right at the point where the oil pressure gauge screws into the block, make the gauge see zero, but the engine still has great pressure. Seen it even move around some and make the gauge go to working again. More than once, in fact. Not a bad idea to remove the fitting where the gauge line screws into the block and inspect it there. Might have some crap in it that the machine shop missed. Wouldn't be the first time. I agree with your assertion that none of his problems come from the damage to the oil pan. Just too insignificant. I would sure as hell be DOING something, rather than battin it around on an internet forum. To the OP, you have the car, not us, so that puts you WAY ahead of the ball game here.