A return line is a good idea to help combat vapor lock issues in the future. You would need a pump with a return, or a fuel filter with a return line. With a ‘return’ system, the fuel is less prone to getting hot, since it circulates back to the tank what is not needed. In the 60’s & 70’s, the A/C cars had a return line from the filter, due to the higher underhood heat of an A/C equipped car.