combustion chamber question

The math points to a Dcr of 8.82@ 181psi. Depending on your ICA.
There is at least one guy here on FABO that says he is running over 9.0 Dynamic on pump gas with aluminum heads.

I myself ran 11.3 and 8.6@176, with an aluminum headed 367, on 87E10.This with a 292/508/108 cam in a 3600# 68Barracuda with 3.55s and a 4speed.
Yeah my squish was tight; about .028 to .030. Man that combo was meeean