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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.

running the race gasket (.039) with iron heads. and it has taken prob 50 or 60 passes for these to fail. yes hopefully the block is not hurt. but we will check all that out.