I don't really know what GM was trying to accomplish with the CERV III, why it was badged as a corvette but called CERV III instead, or why they never did anything with it considering it was a finished product, but here's some real cool footage.
I see some strong C4 corvette influences there, it's sort of like a space age C4.
https://www.youtube.com/watch?v=EWV6ea7NcW4