Throughout Cobra production both AC Cars, Ltd. and Shelby American continually looked toward the future. Each was aware that the Cobra project, in its present form, would not last indefinitely. The opportunities for spin-offs, prototypes, show cars or one-offs were continually surfacing—especially at AC Cars. AC found themselves in what was, for them, the embarrassing position of what Shelby considered their parts supplier. The company had a proud history as an automobile manufacturer that dated back to 1902. Suddenly they realized that the major portion of their business was not building cars but supplying parts. So, whenever someone came to them with an idea for a show car—or when they had an idea of their own—they took action. This resulted in a number of prototypes, one-offs and experimental cars and chassis built both during and after the production of Cobras, using Cobra chassis or modified versions of them. These chassis carried unique serial numbers and, as such, can be identified. The inclusion of these cars in this registry is not meant to infer that they are legitimate Cobras. On the contrary, our purpose is to provide as much information about them as we are able to gather so that they are not mistaken for or misrepresented as genuine Cobras.