great info-thanks ou812 and others. $4000 + assembly for 455 horse is very good, the old $ 10/hp ended around 1999. I am old school-cams with a ton more exhaust were good for like old ford heads with poor exhaust flow. I agree that this combo did very well on the dyno, and if money grew on trees and we tried 10 more cams I think we would have found another that was slightly more better