IMO, Because the stock head and cam combo are limited you are fairly safe.. as the boost pressure becomes more of a reading of unused or left over manifold pressure after a certain point. I have run 30 psi at 20 degrees with a 45a, Razor's kit,TT chip and motron 60's. I only lost a head gasket after I popped the line off the FP reg. and did not lift quickly enough. I now run 25PSI with Champ heads,23 degrees, Razor's, 60's,V1 FM,and a 67 bb turbo. All this on pump gas with 0 KR. Stock block, crank and rods no caps no girdle.