Okay, this one has me stumped. '68 440 freshly rebuilt bored, resized rods, new pistons, hughes cam (hydraulic), everything new. Anyway, while using the prime rod, drill I have resistance (enough to nearly stop the drill on high speed), rotate engine and get plenty of oil to the right side rockers, not so much on the left. I have no oil going to the sending unit NONE. If I had a oil galley plug missing, I would have no oil pressure, but it is pumping oil to the right valve train when the cam is turned to feed it. I thought of restriction, but the galley that feeds under the lifter is a pretty good diameter. Not sure if front galley plug is missing, would it still build pressure? Never had this happen before. Any ideas?
