On the Mighty truck if it's the one I google searched and found on an ended auction on Ebay, the orange Adventurer SE step side, I'd say it is a really rare truck being a 440 stepside Adventurer SE. I think the stacks were a dealer add on or a previous owner add on. It is an extremely rare truck just for the fact of 440 2wd step side Adventurer SE. Very few 440 1/2 ton 2wd and even fewer Adventurer SE step sides put the two together and it is really rare. I have only seen one other step side Adventurer SE 440 truck it was a 77 and it was in Hawaii a former member on here had it, not sure what became of that truck. If it really checks out to be a vin code D truck it would be a good truck to restore because of the rarity of it.