Ok, at the risk of "kalbert" jumping all over me again for being a "know-it-all," I have never heard this version.
I was under the impression that the Viper was conceived at the Chrysler Advanced Design Studios in Carlsbad, California, in the late '80s, Bob Lutz liked what he saw, and being a "car guy" rather than a bean counter, gave the green light to produce it. I have never heard any version where Chrysler engineers were sent to Kenosha and told to come up with something new, or where any AMC designers were involved.
Again... not to be a "know it all," just want to hear more about this, as I've never heard this story before.