I've thought about doing a circuit to power the fuel pump that would reduce the return fuel to the tank. This was a major thing running the original type fuel pump because it would buzz when the gas in the tank got hot. Now with the new type pumps this does not seem to be a problem. But would there be any other advantage to cooling the fuel in the tank?
Most all injected cars use a return line to control fuel pressure. Their pressure regulator is not mounted on a hot engine though.
To control our fuel pump I would have a pressure sensor to reduce electrical power to the pump above 75 PSI. I would probably keep the existing PPR but add a shim to set that around 80 PSI.