Bolt a plate big enough to hold the fuel pump to the frame rail in a safe location between the rear axle and the tank. You can power the fuel pump through an ignition hot power source, but it won't run the pump until the ignition switch is in the rum position. That is the way I run mine. Powered this way, the pump will run whenever the key is in the run position. If you wreck the car, turn off the ignition switch. If you set the power source up with a relay and ground the relay through the oil pressure switch, the pump won't run until the motor has oil pressure, and it won't run if you loose oil pressure, a pretty good safety feature.

Mount the pump so it is below the fuel line coming out of the tank, then have the electric fuel pump mount mounted so that then inlet (coming from the tank) on the pump is slightly below the level of the outlet. What this will do is assure the inlet is covered with fuel as soon as it is turned on. If there is fuel the pump can pick up, having fuel at the inlet upon powering the pump will allow the pump to pull the fuel into the pump. A pump without defects will last a long time. Gene