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...who is running an iron headed 9.5:1 small block with no detonation problems on 91 octane?

I am (almost)...Hughes HE3844AL hudraulic flat tappet...238/244 @ 0.050"....verified 9.7:1 static CR...fast ignition curve (21 initial, 38 total)...no detonation on 94 octane, dynamic compression is 165-170 psi.

In fact, I just picked up my heads from the machine shop as I'm going to a 10.5:1 static CR...gimme a week or two and I'll report back....it'll be a bit hairy I suspect....

My cam is much bigger then what you are looking for though...so this is not a recommendation regarding cam size but rather a point of reference for what is working for me.