Can someone please tell me how to know if a rear spoiler is original? I looked for part numbers, but could not locate any. In the sleeve, where the three post are in bottom is an A and on the other an B. The white one is the one I’m looking at, the black was just for comparison. Any information that you could provide would be appreciated, thanks.

 

Most of the aftermarket one are two studs, not three. I would think a factory one would have a part number.

 

Yes, factory with the three studs and the two flat panhead screws attaching the pedestals.

 

The white one looks a little too nice to be a 50 year old original. The nicer reproductions have the same three stud arrangement as the originals. The photo in post 1 doesn't show if the correct screws are in place on the white wing in question.
Here is the current reproduction Fusick is selling:

 

To JR442: Is the white wing in post 1 actually painted white, or is it a grey primer color? If it is flat grey, it is probably one of the better reproductions shown above.

 

The oem supplier of spoilers continued to produce spoilers til the 80 and some ha 2 bolts. I sold a 2 bolt thinking I wanted a 3 bolt..i was dumb and un informed