I snapped the head off one of the oil pan bolts, the one that bolts into the rear main seal gasket plate.
What grade are these bolts? Can I run a grade 8.8 that I found at Ace/Lowes/Home Depot?
Those bolts aren't made to be torqued down too much at all, I'm pretty sure they are grade 3
Ditto, they are nothing special. But, you'd be fine using the 8.8 if you'd like
A lot of people don't realize this, but Albert Einstein actually had a bastard daughter.