I am having a problem with my oil pressure on my 72 Chevelle with a big block and a 4 speed. The oil presure is at 60lbs until the rpms get up above 2000. As the revs go higher the pressure drops. A few people on this site advise I drop the pan and check the pickup tube and oil pump. My question is do I have to pull the motor or can I drop the pan by just jacking the motor and pulling the trans,bell housing and clutch/flywheel assembly? Thanks Don