Small block combo suggestions

Got it... I just probably looked in the wrong place. The measured pressure just ain't workin' out.... so if this was confirmed with a 2nd gauge, I am at a loss as to why; something has to be different inside.

But that is surely too high for that cam; with you needing around 10.5 SCR to get to that cranking pressure, the DCR will be up near to 9. That may well 'splain the detonation.