I'll give you a short summary with lots of missing details and based upon foggy memories. How does that sound?
Carroll was developing his own car and looking for support from any of the major manufacturers to get the thing funded and built. He built a chassis and more but I'm not sure exactly how far along he was in the development process. Chrysler/Dodge, Bob Lutz, decided to work with him in creating the car, later known as the "Viper." At this time Carroll was getting weaker and weaker and in the hospital awaiting a heart transplant. His involvement in the development of the car decreased considerably due to his health and Lutz carried the project to completion. It ended up not being quite the car Carroll had envisioned but a brute nonetheless. The car was bigger and heavier than what Carroll originally wanted so I would imagine that the chassis that was sold did not closely resemble the final product known as the Viper. I remember when he was selling that stuff but have not seen it.
Randall