I'll throw in my .02. In '71-'75 I lived in Forsyth county NC. I was not a car guy of any sort.
I do remember seeing an A body with the Challenger "340 6 pak" sticker on the fenders. I saw this car or cars more than once, really made an impression on me. I'm not sure if it was a Demon or Duster, but definitely saw them. Since not factory, either a local dealer or sticker hop up. Never thought to ask any rodders of this era if they remember anything similar.
