Ford Cougar II, built on a Cobra Chassis CSX 2008

The Cougar II had a fiberglass body, a 260 High-Performance engine and a four-speed transmission. It was a GT two-passenger sports car that appeared to be a suitable contender for the Chevrolet Corvette String Ray. The car had a fastback roof, concealed 'pop-up' headlights, and full instrument interior.

The high-performance 260 cubic-inch V8 engine was capable of carrying the Cougar II to an estimated top speed of 170 miles per hour. When interior air pressure exceeded 15 pounds per square inch, a relief panel across the rear of the passenger compartment would automatically open. The purpose of this panel was to relieve the extreme pressure that would be caused at high speeds, which may have resulted in the rear window being blown out. Another feature to the car was a spring-loaded window-lift mechanism to the curved side windows.

https://revslib.stanford.edu/catalog/pq028bt3775
https://revslib.stanford.edu/catalog/ym379cj4466
https://revslib.stanford.edu/catalog/db422hh4120
https://revslib.stanford.edu/catalog/jp574gn0412
https://revslib.stanford.edu/catalog/cy036yb4016
https://revslib.stanford.edu/catalog/yt800dq2473
https://revslib.stanford.edu/catalog/tn438bp4385

seems obvious that Ford had Vignale try for something exactly between the Jag E-type, and the Vette.
http://www.carstyling.ru/en/car/1963_ford_cougar_ii/images/26020/
http://www.95customs.com/the-1962-63-ford-x-car-concepts/2015/3/16