Help on 408 build

No worries... I was just stating that my J headed 340 with 9.5 comp can barely get way with pump gas. It is good if I fill up and use the gas within a few weeks... if the car sits for 3 weeks or more I can get it to ping a little under load.
I think if he wants to run decent with J heads around these parts 9.5 comp or around 160 psi cranking compression is the limit