Andy,
i dont know if you covered this in an earlier post or not, but did you check to see how much difference there was in rocker ratio with the Jesel rockers between unloaded and loaded?

as for the .800+ lift requirement to make peak power at 6500......i guess my first response would be.....where did it make peak power before with the .650 lift flat tappet cam?

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads