I have to disagree with this comment.

Not sure if you meant it to be specific to the OP's combination, but if meant as a general rule it is not the case, too much depends on cam timing events, etc.

Case in point, I have a 360 motor, heavily worked factory iron heads - open chamber (596 casting), thus terrible quench LOL as in -0.015 deck height and a good 0.090" of the open chamber on top of it. But my static CR is blueprinted at 10.6:1, yet the motor runs with NO ping using a very fast ignition advance curve on a pump 94 octane gas.

The cam in my case is: Hughes HE3844AL hydraulic flat tappet, 238/244 @ 0.050 on 108LSA.