Type of fuel, temperature and usage are big variables.
An engine compartment mounted pump sucks the fuel from the back. If the fuel gets hot and boils, pump capacity does not matter. It won't pump anything useful sucking vapor.
Current pump gas is made for EFI systems and boils easily.
A suitable electric pump mounted in the rear where it is cooler often works much better vs engine mounted pump. It gets some pressure in the fuel before it gets into the hot engine compartment. That would be my suggestion.
