And remember if you were to add a pump it would have to be inside the engine. As in prepared classes external mods are not allowed.
Now if your going FX. Plumb a line and mount the pump to the frame!
I was going to use a fuel pump on my FX that I put the engine on the side if I didn't get enough oil to the rockers. I'm sure it will pump the oil, but didn't know if it would take the heat. If you could find a gear drive pump would be your best bet.
Paul