Thanks. The cranking compression reads at 160psi, I believe I measured that cold. A little low, but still runs great. It's a new motor... The cam is a fairly big solid flat tappet with 240 deg. @ .050. on a 108 LSA. .530 lift. Desktop Dyno's have said this motor to push at least 450HP to upwards of about 500HP and about the same Torque. The Heads have been ported and polished and tested at 271cfm at .500lift @28in. 1.75" primary tubes and 3" collector doug thorley headers. The exhaust is just a set of 3" Purple Horny glasspack mufflers.(They weren't too happy when I brought it in to dyno) Performer RPM Air Gap Intake. 750cfm pumper carb. The jets are 73/82's right now.