But I think I have it ironed out now.
Here is the SPID from my '71 "Cheyenne"
I had my doubts for a moment when I saw the CUSTOM SPORT TRUCK beside Z84, I assume my truck is just earlier production. The Cheyenne badges don't look like they were ever off the truck.
I'm working on decoding all the options, slightly bummed that my white side truck was built as a 572, (white top).
Am I correct that the "F" means it was built in Flint?