My search for a shorty D100 is over

NICE SCORE. I am truly happy for you. I remember how long I looked for the 69 340 Barracuda I have had for about 33 years. No internet back then. You've got a clean slate! I kind of like the idea of keeping it stock. I mean, how many trucks like that have you seen at a Mopar car show with a 225 three on the tree. That being said, I would 100% support you making it the truck you would have special ordered back in the day. Could you please tell me what Fleet Side means. Does that mean a bare bones truck? It really looks good in white.
You have the Fleet side, as this one and a step side, with a step protruding out of the front of the bed, to step up into the bed (as in the Little Red Express). I prefer the step side myself.