Behind the tail light on the driver's side.
That's on a '56. The center section of the the tailfin chrome on the driver's side swings out and the gas cap is there on a '57.
Pull the tank. It is easy enough.
put some more gas in her!!
Practical answer is no
Within 2 feet of where you put the gas in.
Thru the fuel-filler nozzle...
Regular unleaded
FORD
Out of gas?
as many gallons as you put in it
Yes you can and you will feel the difference in power .
Put gas in the tank and try again.
I was able to put 23.32 gallons in my 1994 Chevy Astro EXT AWD.