With the Superbirds - I think Plymouth tried to save a few on a car that they were already loosing money on. The existence of a less-expensive trim ring probably helped with the decision to have "Rallye Wheels" STANDARD equipment on the 2,700+ AARs the following spring.

IMO Follow the b'cast, without one follow the norm - Superbirds are pretty well documented & known when they were built, so the sheet from a close car should provide the answer.

Trim rings were shipped from the factory in the trunk. When the PDI at the dealership (or contracted garage) was complete, it's anybody's guess If the "correct" trim rings made it from the trunk to the wheels on each & every car. They could've been put in the parts department until the car was "SOLD" - there are a thousand "what-if?" or "why?" unanswerable questions/variations. Do you want a car "perfect" in the eye of Chrysler's intentions or are you replicating every error and/or flaw?