Almost no oil pressure help

so far Rusty has the best diagnostic... i was able to sneak away at lunch and do a prime with the my no gear shaft tool and with an open oil galley to the top of the block... on the first prime i had some spurts with oil chunks and black... on the 2nd prime i had new fresh flowing oil and a quality amount.... now i have to get to the auto store and get a gauge for the port and prime to see what I'm making in psi and if that looks half decent ill fire her up for a reading....