OEM head gaskets always seem to be good. Other brands seem to be hit-miss. Only use mls gaskets. I have non-oem gaskets AND reused the stock bolts with no problem. I also do extra work to make sure I have consistent torque.

DONT shave the heads. If you have warpage you might have to but do it minimally. You need all the timing components in their right places for cam timing and belt tension.

Sorry the other two got mixed up in your quest for real info.

-SP