I am thinking 11.2 should work out fine with a cam that healthy. The 11.5 may be pushing it some..
My father is running 11.2 on a 383 solid roller cam of right at that duration with ported 915s but he is also running like .035 quench and he does not detonate.
So with heads that are 60cc you would have to open them up or be running a cam with a really late close to be able to run a decent quench of around.040 on 92 octane is that right?