Most your answers lay in three places, the motor town docs and the approval docs/prints from within chrysler and marketing bullitons/fast fact sheets. After the introductory time period the TX9 and MV1. They needed two cars to showcase, one black one orange. Just like all early demon ads and brochures they were all in RED. When the new ram line was introduced, everywhere you looked you saw the now ram line in red, but you could get others easily.
The A66 colors approved on 4/29/76 were the pnes I posted the pic of in the stripe post, Marketing pushed the Black and Orange. Marketing, and more marketing. As the 77 year progressed some of the A57 colors migrated to the A66 cars. Just like today look at marketing bullitons, release what will sell, dont provide other options at that time. Then when thats mellowed out release something different of the same and sell more. If each progressive year or during that model year if you offered a lesser car or decreased options how would the cars sell? They would not, the only thing the could change is color and strip options. No improvement nearly of any type other then color or stripe options.
You ask "Where is the possibility of any of this happening documented" the documentation your looking for, the most substantial proof is right there in your pic of the fender tag of a built car. The tag and the #matching car is the primary documentation for most any mopar. Going up the ladder to the BS where although semi rare the A66 B sheets match the tag. Thats documentation. But there are docs that go further that most dont even care about because in the big picture they dont matter to 99.9%.
I dont think there were any wrong color SP cars,
Do you have updated documents to include?
Aspen A66 not required built in PX8 black metallic. Yes, Its posted in the stripe post, marketing dictated when colors could be used.
Volare A66 not required built in MV1 Spitfire Orange. Yes
Availability of K7X and K7Y stripe sets, Aspen A66. Yes,K7X had approval with the red and orange and gold (same time) Have to dig on the K7Y.
Availability of other than K6V set with Volare A66. Is this possible, or no? Thinking.
I dont know dick in the big picture but with all the right info in one place if correct info, people can collectively connect the dots.
The aspen you refered to is a 3/20 car but there were loads of A57/A66 cars built in March 77 early and late. Ive a couple that were probably really close to each other physically.
Notice the really late SPD and vin on the RR tag.