Gas shut off valve '31

[BlueSunoco]

The gas shut off valve in the engine compartment on a '31 seems like it would be a pain. A lot easier to shut off the fuel from inside the passenger's compartment as we're told is a good idea whenever you leave the car sitting.

SO, just mulling here, why not put a shut off valve inside the car, and leave the valve on the firewall either open all the time or eliminate it? Anybody with a '31 doing this?