Here's one that caught my eye. It looks like an interesting build and I got a '67 Mustang Fastback just for this project. These seem to be the only photos on the net. There is two versions of this one, check out the bumper, grill and headlight changes.
1967-1968 MACH I
"
With a hint of the Italian design influences that the company was enamored of during that period, the Mach I made the auto show circuit during 1968. The car had an exotic chopped top, glass-covered headlights, a rear hatch, a full-width taillight in the rear, and a prominent grille protruding up front. And in a nod to the highly successful and widely recognized Ford GT40 race car, the scoops on the rear quarters were real--they fed cooling air to the brakes."  And "The Mach 1 concept teases the design direction of the production 1967 Mustang 2+2 Fastback. The concept featured large rear-body scoops, racing style flip-open fuel doors, four exhaust ports and mag wheels. The front end was changed several times to create a more traditional Mustang look."
If I build it, the version with the extended hood, covered headlights and no bumper. Hey! It's got Firestone big-little tires and large radiused wheels flares.
This kit is readily available.