1972 prototype dodge truck?

I personally would go check it out, he probably doesn't mean all zeros but 100027 as the production number. That would be the 27th off the line on a completely redesigned 72 model year. Definitely a preproduction. Not some unique long bed "big" little red, but still a cool truck restored back the way it should be. If the rest of the Vin shows the 383 to be factory then you really have something, full production 72s should have a 400 as the only big block. Like I said, the Vin is worth a look before poo-pooing it.