Good morning all, I have a 73 Buick Le Sabre w the 455 engine & just got the rebuild back together. I replaced the gears in the oil pump & packed it with vasolene; I primed the pump with an electric drill & showed 50 pds on the manual gauge, took all spark plugs out & spun motor with the starter but no pressure on the gauge. Anyone out there have any advise? Thx for your help....Richard