How much oil pressure should there be compared to shaft oiling...I just primed my engine with a drill and only showing 30lbs pressure.

I have crower cutaway lifters in an unbushed mega block that i was told would work with bushings or not.

Also have manton pushrods with 30 thousand hole that is suppose to keep the pressure up.

I know all of my shaft oilers would hit 75 psi almost instantly with the drill but that was using solid body comp lifters.