A no-power condition from dirt in the carburetor main metering jets, was not uncommon in older trucks and tractors. You could remove and disassemble the carb, if you could make it home. Or, reverse two park plug wires, let the engine idle for a minute, this made it backfire, pressurizing the intake, and blowing the dirt back into the carburetor bowl. Would replug eventually, but you could make it on into town. Taught to me by an old mechanic in the 60s.