Jim, you know hemis are different than wedges, but I have about 11:1 in my hemi and it runs fine on pump 93...when I get the non ethanol stuff. It has 185 psi cranking. Summer time w/ ethanol blended 93 it will rattle and lose a noticeable amount of power.

My 440 is 14.5:1 and has 185 psi cranking compression also, but it'll never see anything but race fuel.

The pump 93 isn't what it was a few years ago, so I'd go conservative on the compression if it was me.