This rather attractive (barring the headlights) car is a rendering of what a Viper may have looked like in 1967. It's done by Rafael Reston and I got these pics (more here) care of Autoblog.
Pretty cool I gotta say, thought I see in my eyes some design flaws. The overall shape though is gorgeous and the hood vents and engine - excellent is with the rear.
Looks particularly nice in silver, dark red, and black I think.
Dodge Viper Concept 1967 #1