I tried priming the engine with the drill for at least 10 min. at high speed and oil is still not coming to ANY of the rockers. Oil pressure at the guage is at 55 PSI. Has a melling HV oil pump. I don't get it. The engine is a 1966 396, I made sure it has the rear grooved cam bearing, and I also had a machine shop make the groove in the rear journal of the camshaft. I had the drill at slow & high speed for a good 15 minutes, took off the valve cover no signs of oil. Then I did at high speed for another 10 minutes with the valve covers off and still no sign of oil.

Any ideas?????