boxcar, I'm curious, when I checked the 3 set of magnum rockers I have here (at the valve) I get more like 1.56 to 1.57 average ratios, I am assuming you are just checking the pure rocker ratio to get your rather high figures? And that the severe lifter angle and the higher than rated "rocker" ratio cancel each other out and net about a 1.6 at the valve????

Just trying to sort out all the different info out there floating around about the magnum heads/valve gear, it seem like everyone I talk to tells me something different