Filling up at the gas station

Besides the filling pain and holding the nozzle upside down mine would spill out the cap when doing hard right turns and run down the fender staining the paint . My solution was to only fill to 3/4 tank or just 12 gallons in the tank .

Now that the car is repainted I don’t want to play that game anymore .
I’m seriously thinking about cutting the trunk floor for a 60’s Mustang tank with fuel injection pump and moving the filler to the top center and then maybe plumbing it to the stock fill location. All this would be under a lift deck like in the station wagons .