Progress report. Fuel pump will not draw from a gas can. If I gravity feed to the pump it barely pumps any fuel at all.
Regarding fuel tank, the fuel outlet line is connected to a fitting at the front of the tank that also has a petcock valve. These are located 4" above the bottom of the tank. At the rear there is a drain plug on the bottom of the tank.
I don't know what the inside of the tank looks like so I'll have to imagine that there is a filter and pickup tube similar to an oil pump setup in an oil pan. Otherwise why would the fuel outlet be located so high above the bottom of the tank?
I wondered if the tank was original to this truck, a '48GMC, so I checked my other 1 Ton, a '48Chevy, and it has the same tank setup.
