This car has ZERO ties to Shelby history other than being built by a guy who drove for CS "It was
driven and built by Shelby team driver Bob Johnson". It never ran TA in period so it's not eligible for the Historic TA group (where the cars bring big money). Here is the page on the rebodied 63
http://www.historictransam.com/Drivers/MikeEddy64Falcon17.html - They are trying to hype this car as special and of big historical importance. It isn't - but it is a neat A Sedan race car that was raced by a noted driver. But that hype will also need to be backed up with the original log books which are not mentioned in the spiel. Also are the FIA papers included merely a printout of the historic file
https://historicdb.fia.com/ in the FIA website or a current (and expensive) inspection report by the FIA showing the car conforms to the historic build requirements anf therefore legal to compete in European historic races like Goodwood (PS you can build a car today with zero history and the FIA will license it for Euro historic racing - one of the continuation R Models has been certified)?
With FG parts it was not TA legal until after 1972 when SCCA began to allow fiberglass parts for transam cars. That became known as the 2nd era. The "modern era" began in 1980 with full tube frame cars - that still required the use of a factory stamped steel roof section. The rest of the body could be FG and up to 80" wide. These were known as silhouette cars. By the early 90s the whole body could be FG.
This is a page from the 1972 GCR for TA cars.
That being said when Ford did the FIA paperwork they did allow FG panels and the SCCA did follow FIA rules for sedan cars. This is from FIA appendix J for Touring cars - 6413F - 1964 Falcon Sprint. The 999 serial number means nothing they started a 00001. The second is from the FIA paperwork.