millin a couple thous off the heads will help more than you might realize. those compression points count, and were in rather short supply through the 80s. personally, im a huge fan of crower cams. just follow the tabs on their page. for most of the cams, it tells you were the cams powerband is gonna be at. of course, it will change a little dependin on your setup, but it gives you a ballpark. crower.com