here is the pic of my old oil pump.
FYI, the vertical tubes on the left is the pressure side and the right side is the vaccum side. If you wanted to. You can take the plug on the left and replace it with a plug for a pressure sender gallery plug.
http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg
If you wanted too, too prevent this in the future. You can bore out the blow back hole with a drill bit and make the hole bigger.