Considering that the original tires were about 30-31" in diameter, I think larger tires that would help with your fuel economy.
225/85 R16 are about the closest in size to the original tires. I have them on my Packard and they look right at home under big fat fenders.
The in-cab tank feeds via gravity from the bottom rather than through a sending unit. Would the fuel pump mount somewhere under the cab, I guess? A return line would have to be configured to empty into the filler neck, I suppose. Is the gas cap vented?
Are there no in-tank units available that would work in the factory tank? I guess it would have to be tall and skinny.
Noise? No problem. It'll have to compete with the valve clatter and wind noise. Add in the heater motor in the winter and nobody will know there's a fuel pump under the floorboards!
Last edited by Otto Skorzeny; 01/10/2023 11:33 PM.