What's the highest CR you can safely run with pump gas?

I run 200 psi cranking. And the static is 11.2 with j heads, I run a total timing of 30 and a very cold NGK 9 plug with a MSD. It is on the razor edge but has been this way for 10 years, the hi stall and somewhat lighter car help. I would recommend keeping your cranking psi under 180 to run 93.