65 Dart gas tank leak

The problem being is the outlet of the pickup is almost at the top of the tank and the pickup goes up first about 6 inches then follows the contour of the frame down to where I have the pump mounted. The pump looses its prime because it flows back down the pickup and doesn't have enough suction to pull it back up. If I put an outlet at the bottom of the tank then I will have gravity keeping the pump primed. Am I seeing something wrong here? With the mechanical pump it worked fine but this roller motor doesn't have provisions for that. The mechanical pumps suck/pull the fuel out of the tank and the electric I have pushes the fuel rather than suck, correct?