Rocker Priming: Odd Cam Oil Hole Angle

The oil to the top end is regulated by the diameter of the hole in the cam. Oil only will flow when the holes line up, which is only for a short time (in rotational degrees). If you either groove the cam, or run pushrod oiling the rocker might become the restriction. Personally I'd want as much oil as possible to get out of that shaft if I'm using the stock rocker shaft oiling.