The fantastic Ford GT went out of production in 2006, leaving Ford without a genuine supercar in its portfolio. The GR-1 could have been that car. A 6.4-liter, 605-hp V-10 powers the sinewy silver coupe that was inspired by the 1964 Shelby Daytona coupe. The highly polished aluminum body heralds its naked finish proudly. 

Back in the day, Ford's design chief J. Mays opined that the company could afford to build the GR-1 thanks to its extensive use of Ford GT parts. But no such luck—the car never went into production. 

While the 2013 Shelby GT-500 is a wonderful, powerful car, a supercar it's not. Ford: Even with Mr. Shelby's passing, you could still build this car.