priming the oil pump

Update : took the engine apart and found a number of issues. The issue was the result of the engine sitting so long. Sludge in the oil pan, one piston with rings frozen on piston, dirty lifters,... etc... I'm trying to ID the cam, which is marked with MPJ with 3 blue dots. Is it a Mopar performance cam? Want to get the Cam Card for it... Dave W.