Back in the mid 1960s, I use to visit friends on a Southern California Indian Reservation.
I was still in the Navy when i met them.
THe woman was in charge of the Tribes Finances.
When i needed to go back to North Island, where my Carrier was docked.
That woman would let me top off my gas tank with AV Gas & my 1956 Ford ran real well on that stuff
I think mine had a 272 Cu. In in it when it left the factory
One year when i went on a WEST PAC, i sent the engine to a machine shop for a rebuild & better camshaft, i had the Automatic Transmission reworked to take the power of the engine