I'd run the thicker gaskets and not worry about the quench.
I have heard that quench effectivness diminishes as rpm goes way up?
One of the guys on here did an experiment with a 440 and went from bad quench to tight quench and saw the biggest gains as the RPM went up, big time, like 50 HP. I think it was jesse lackman but don't quote me on that.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
