That is a very rare car indeed. The Sundancer was available on both the Eagle and the Concord for 81' and 82'. They started their life as a "Limited" trim package, 2 door coupe and were sent off to the Griffith Company, in Ft Lauderdale FL, to be be converted. This was a spendy option, adding additional $3750 to the sticker price...Putting the total cost of the car into luxury car price range, and with a sticker price like that it found few takers. There are no official numbers as to exactly how many sold...but we do know it was very few, the general concensus being around 200 give or take...It is unlikely that even half of those have survived...So that car you got, I can confidently say is extremely rare! .Congratulations on an amazing find...and welcome!!