We are restoring a 71 Cuda (BS23N1B) and the car appears to have had both the M88 4 piece "Cuda mouldings" on the rear panel as well as the M38 wider 3 piece "Gran Coupe mouldings." Was this possible to get both of these on one car?

The holes appear to be original and I have never seen another car with both sets of mouldings. Is the M38 moulding a code that would be on a fender tag or is that a buildsheet only code?