Just on thing to consider: The OP's description of the head and gaskets and pistons leads to an SCR of no better than around 8.3-8.4. I suspect he would not see 160 psi (on an accurate gauge) even with 30 or 40 degrees of cam advance; he is just starting too low in SCR. (Plus he is at around 1000' altitude). It looks like he will be doing great to have a true 140 psi cranking pressure with 10 degrees of cam advance.