1972 prototype dodge truck?

FWIW...years ago, one-off vehicles were not uncommon. I worked in Sales for a Chrysler dealer, and the district rep told us to never lose a sale because a certain option wasn’t available. My most strange and memorable special order was a ’64 New Yorker 4-door that was ordered with a three speed manual transmission. An old farmer, who was a good customer, didn’t trust automatic transmissions, but wanted the top of the line Chrysler. Manuals with a floor shifter could be had on a Newport, but not New Yorkers.
It was far more common for trucks to be ordered with all sorts of deviations from the regular option list. One of my buyers owned a helicopter service, and he ordered a 4WD with custom fuel tanks, improved suspension, special winch, relocated spare tire, special color, special lighting, and I can’t remember all the powertrain changes, but there were several. It took about three months to build, but he got what he wanted. There were so many changes, he worked directly with the regional rep, but I got the commission.