In the late 1970s, 
General Motors came up with the idea of producing a four-door version of the C3 
Corvette,  hiring California Custom Coach in Pasadena to design and build the  sports car-inspired sedan. The automaker had planned to produce 40  examples of the four door Corvette each year, but with the price tag for  the so-called Corvette America coming in at over $35,000, the vehicle  was deemed two expensive and the production plans were abandoned. CCC  built one prototype and five customer cars before GM pulled the plug,  however, a handful of which still exist today.
Well, I can't get the pic to work...here's a link to it.
https://gmauthority.com/blog/wp-cont...01-720x340.jpg