will it run on pump gas ?

FWIW, my 360 has 10.6:1 static compression and cranking pressure between 175 and 185 psi, it also has closed chamber magnum heads. I have 15 degrees initial and 33 degrees total mechanic advance, all in at 2500 rpm.

This engine runs with no audible detonation on 89 octane. A testament to what a closed chamber head with an ideal 0.040" quench does for you.