6 1/2 Skuzz, Miller Motorsport Park has the "1/2" that was never completed, just a shell.
Frenchy, I was not disputing you.
There were 6 official production Daytona Coupes. Serial #'s: CSX2286, CSX2287, CSX2299, CSX2300, CSX2601, and CSX2602. CSX2287 was the first one delivered.
There was the mule car (no serial number) at Shelby's Venice facility, where Pete Brock did the design, and the body molds were hammered out there. The mule was a shell mostly made of wood, hand covered in aluminum. It was used to get the final design done. That may be the 'shell' you are talking about. All the photos, I have on hand, are from the original era when they were being built/designed.
The unofficial 7th car was built for Lynn Park, in 1991, by Mike McCluskey from the burned out hulk of Cobra CSX2405 (2405 was a street version Cobra). Mike also is responsible for the restoration of Daytona's CSX2299, CSX2300, and CSX2602. CSX2602 was used to make the molds for kit car company Contemporary and thier Daytona kit.