Pulled the dizzy and spun the oil pump for about 10 minutes in both directions and still no pressure or flow to the rockers. The drill didnt seem to have a load on it during this spin, unlike the first time I primed the system when I could tell the drill was laboring to pump the oil. Am using a new oil filter of the same type I used for break-in and even filled the cartridge with oil before starting the engine this time. Will try to backflow the system per hot rod lincoln, but would like a couple of more ideas before I ¨bite the bullet¨ and drop the pan.