Just recently scored some stage 3 ported 03-04 cobra heads complete with comp stage 3 cams/springs/locks/retainers and secondary chains already installed. Some of you guys with ported heads and/or stage 3 comp cams post up and tell me what kind of gains i will be looking at. Maybe this will motivate me to install them. I have full bolt ons, KB 2.8H, Kooks long tubes, Jlt, fuel system, killer chiller, etc, etc., etc. I'm looking at 18-20psi pump gas tune and 25psi race tune. Just looking for some possible numbers. Currently im at 623rwhp. Thanks guys.