You have to remember that when the engine is running, the holes in the cam to feed the heads only line up for a split second every other revolution.

There is no flood of oil going to the top end with the interrupted factory thru-the-cam oiling when the engine is running.

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