Yea it's true that you could do that but it's is illegal and if caught your stuck with a big penalty fine.. It's 100% legit the truck has all information needed to prove mileage.
My old truck. It was sold back in 2007 to a fellow in Missouri. If anyone knows its current whereabouts, please send me a PM. The bed had a plain sheetmetal false floor that was rhino-lined black. The rear had a tri-4link.