I've never heard of the 1974 Satellite Sundance, but they only made about 300 of them, and they aren't desirable in any way, so it's not any surprise they are forgotten

1974 was a end run year, the Satellite body was only given minor updates mainly for emissions and safety compliance. The series trim level started with Satellite, Satellite Custom, Roadrunner occupied the performance end while Sebring and Sebring Plus took care of the premium trim series.

the Sundance coupe which offered a unique set of graphics on the hood and sail panels and a special interior to coordinate with the metallic gold paint. It was a Spring Promo based on the Sebring Plus model. The Sundance option gave you a special interior with white vinyl bolsters and Sundance pattern cloth inserts on door panels and seats. The exterior received Sundance sail panel decals, grille header panel decal.

http://phscollectorcarworld.blogspot.com/2018/08/1974-plymouth-satellite-sundance-edition.html