All Victorias were listed as 31. They had the first indented top radiator shell. 99% Leatherbacks were all flat firewalls. Indented firewalls did not start until about May of 31. Victorias were first offered in October 1930. Looks to me that the fuel shut off on this is under the gas tank...
They were not factory. There were several variations. Mostly for looks, some claim it gets more light on the road. Some had small colored glass marbles mounted on the top so that you could tell if the lights were on. I never understood that. If it was dark enough for the marbles to work, it was...
Bruce yes 32=12 inch, I have corrected it. Thanks
Herb, I have never seen slotted for the rear, only the front. Anyone I have talked to always said fronts only. I have never seen any Ford documentation either way.
Rocky Mountain are really steel drums with the band around them. THE band is supposed to give more cooling service. The cast drum with slot were late 1931 stock and front only. They carried on into 1932. Make sure you measure them. A=11 inch, 1932=12 inch.