Bryon,
I am not sure of this as they have been changed so much over the years, but I would think at this time the 1997 Shelby Registry would be the most accurate, at least so far as how they left Shelby's. There is a new Registry in progress that will only cover Cobras and when it is finally published will most likely be the most accurate source for the originals.
Actually probably the most accurate source period is ask Ron (ComputerWorks)
Ron