I bought a 70 Dart that has the rear wing

But not coded on the tag. Where would the part number be to see if it's a Ford or mopar? It has been on the car for many years, and the car has sat in a barn a major amount of the time.

Should be near one of the pedestals...

And have a Pentastar right next to it...

The wing has been painted, is there anything on the feet or brackets?

The original "feet" have part numbers and a Pentastar or FoMoCo logo on the inside bottom.