[harley]

Your oil pump is positive displacement. If it is packed full of start up lube that should act as a check valve. I would fill the oil passage, it should drain thru the cam bearings to rod bearings. I used a 1 inch pipe with a 1x1/4 reducer on each end, screwed one end to oil port, filled with oil and used air pressure to fill the passages. No dry bearings and instant oil pressure on start up. Harley