Having been parked that long ago it should be plain old gasoline in the tank, no ethanol. Assume you plan on draining the tank, if they sit very long with 'E' whatever they won't have a tank left to drain.
BC 1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc 1949 GMC 250 project in waiting 1960 C60 pasture art Retired GM dealer tech. 1980 - 2022
