The pictures are out of focus, but I would say you are running RICH. The extra fuel in your exhaust is probubly dripping out the sidepipes, greasy from all the soot that it is carrying, and completely unrelated to your bad
oil pressure sender. If everything looked OK under the inspection of the dist, spin the
oil pump with a socket again, with the sender hole plugged so the
oil goes to the motor instead of the floor. It should start oozing out the tops of the pushrods. If it does, put a new sender in and see what happens. And change your oil before it turns that black, drop a jet size or two as well, your rings will go away if you run that rich.