I'm surprised that nobody has yet posted the Camilo Pardo GT40 design portfolio that Ford offered at its Centennial celebration to commemorate the car's intro. There were just 500 printed, and each one is numbered, as are the prints inside. The 18 x 24" prints show some of the early design sketches and the evolution of the car to the one we all know and love today!
I photographed mine to share with the Forum. Enjoy! :cheers