My dad once made an alternate fuel supply for our '67 Ford pickup when the fuel pump failed at 9:00 at night on a lonely stretch of interstate.
He was a regular McGyver. He found a pop can in the ditch, then took a section of windshield washer hose, syphoned some gas from the tank, and then duct taped the can to the windshield and gravity fed fuel into a vent hole on top of the carb bowl. That got us a mile to an exit and gas station.
Then he bought some fuel line, a gas can, and a nipple that fit the carb inlet. Secured the gas can behind the cab above the carb level, started a syphon, and fed fuel to the carb for the last 50 miles home.