I had Schneider regrind a stock GMC Cam into the following Cam profile: Duration = 286; Duration at .050 = 240; lobe separation = 109; cam lift = .300; valve lift = .450. Intake and Exhaust have same profile. I am getting ready to install the reground cam and was wondering about changes in the way the rocker arms sit on the head. The cam has had it's base circle reduced in diameter quite a bit in order to get the earlier valve lift action. It seems like I will need to adjust the rocker arm screws in or down to compensate for the lower cam base circle. Will this adjustment work? Or, should buy some longer push rods to make up for the lower base circle while keeping the rockers in their current position? Are there other options? Should I be concerned about this at all?
Thanks, Frank Hainey
