318 low oil pressure

gzig5 said
I wouldn't be running it too much more. Bearings can't be getting a hell of a lot of oil. I'd start by pulling the pan and the oil pump. New pump and gasket for less than $100 and hopefully you'll be good to go. If not the whole thing probably needs to come out

I'd pull it and give it new bearings ,an oil pump , freeze out plugs ,and gaskets with a new rear main seal .At this point it's just parts replacement not engine rebuilding Replacing will cost a few hundred rebuilding will cost a couple thousand or more.