Which gasket ? a race gasket or the 8519 ? I had an 8519 fail at 12.2, should have used something better . Also alum heads or iron ? If alum I'd be using studs , especially with that compression.

Run a thread chaser in the block holes before installing the studs , hopefully ythe block didn't get damaged , a failure in that small area can burn thru the deck after the gasket fails.