Is it the original gas tank in the car ? If so best to drop the tank and put in a new gas tank along with a new fuel sending unit and new plastic pickup screen that goes on the send unit in the tank.
This will clean up your low pressure fuel supply problem. Also put on the new mopar fuel pump at the engine block and the new fuel filter too.
If you have an electric fuel pump outside of the rear of the tank pushing the fuel forward, have seen this setup only able to deliver 3 psi fuel pressure, when it should be 6 psi up at the carb.
