[Nedsel]

Gary: Only the FIA and USRRC cars were built at AC Cars in the "cutback door" body style, with front flares and a rear clip much like that of the later 427 cars. They weren't "converted;" that's the way they were originally built.

Ron: There was only one 427 prototype, and that was 2196. Some vendors have attempted to float the idea that 2166 was one also, but it was sold as a stock 289 roadster to its first owner. He had a 427 installed in it, so it was simply a modified car rather than a Shelby prototype. Interestingly, 2166 has since been converted into a Daytona Coupe replica by its current European owner through Robert Sarrailh of LeMans, France.