I use a SBC oil pump in a bucket of new oil. The threaded rod slip into the normal mounti8ng hole but stops short of the discharge plate I made. The other end slips over a bucket edge.
I drive it with my slotted pump driver. I made this one over fifty years ago. They can be bought now for little money. I drive it with an air drill which has the torque to drive it. Discharge tubing goes to correct fitting on back of flathead block.