Cam problem and DRP cams
Posted by Dave Dodge - DRP on February 14, 19100 at 22:02:11:

The stock cam profile of a V65 Magna is .320" lift and 228 degrees duration when checked at .040" lift (in the engine) for comparison. The V65 Sabre has 230 degrees duration @.040" lift.
My DRP Stage 1 Grind has .330" lift and 232 degrees duration. The slight increase in duration provides a better lobe profile than stock to make better contact with the rocker arm.
My Stage 2 Grind has .360" lift, with 242 degrees duration at .040" lift. This cam profile is the largest you can use with stock pistons and valve springs. The cam should also be degreed-in for best clearance and performance.