Allpar has a complete history (with great photos) of the 1970-1974 E-body Challenger. Check it out at: Dodge Challenger - the hot 1970-1974 muscle cars Also, here is the history of the 1970-1974 Barracuda: http://www.allpar.com/model/cuda-E-body.html
I'll agree. I remember when they came out. Wanted one badly, but I was in college with no money. I got out of grad school in 72 and we didn't have any Challengers in stock so I took the red Charger instead of the army green base Charger. I think the Challenger was more money then as well.