Head gasket question

I never have a problem with them (1009)
I race a 400 Roadrunner in NHRA Stock Eliminator
and we believe we have the fastest 400 Stocker in
the country! However, it is Stock Compression but
I run them in several of my Edelbrock Headed Bracket
Cars @ 12 to 1. Never tried them at real high compression.
The stocker has Edelbrock Alum. NHRA approved replacement
heads. What is the Marine Gasket sizeand compessed thickness?
My engine is 060 (4.40 Bore) - I had no Luck with any other
gasket in the car = I would actually get corrosion around the
water passages and destroy the gasket and get a leak situation.

If you are curious =

Goggle John Irving Drag Racer

To see it and a few of the other car.