Yep! Same thing I seen.
Natural Gas? I've heard of those engines bit never seen one.
I know the older forklifts run on propane as a guess,I never ask tho.
I understan It was built for a truck driving school as a promotional or advertising. Then it was sold then painted white and the sleeper was removed and frame was shorter.
If so that can keep it. I'm a builder not a collector.
Think those people sitting on those kit waiting for the price to go up,then the repops hit the shelves. I seen that happen to the IH dump truck.