9.1 compression with a 110 lobe seperation with 3:73 gears and a 300 stall. Could still work. He hasn't got power brakes and we still don't know who ground the cam. Might be milder than the spec card (most usually are). Any doubt, go with Elko's recommendation. And the .015 Gasket set up could give a slight help if cam is properly degreed. I'm assuming the existing squish is approximately .038-.044. Would be nice to have a bit more tech on the components.