Swap pistons for quench?

Thanks for your replies. I really appreciate the help I find on this forum.

Seams like I may be shooting low on compression. My heads are milled , maybe forty thou, I don’t remember. I will go ahead and measure what is left in the area where the quench pad would be. The piston’s quench dome is advertised as 50 thousand tall. With .12 in the hole and a .039 fel pro it would be about even with the head surface. The depth of the chamber would be quench measurement. If I by chance could achieve about 30 quench, what compression could I run with 93 octane?

I did not find a suitable step dome piston yet that didn’t put me in a close to eleven. I’ll measure and report back.