Some of these I've never seen before, some I've seen only once or twice, and not recently.
This is the Barracuda SX concept. If I recall correctly, I think this was a possibility for the 70 model year, and that Chrysler had hired away the stylist who had a lot of input on the GM a-bodies (Chevelle, Skylark, Cutlass, LeMans). I think you can see a lot of those lines in this one.