1966 Ford Mustang, Fastback, Coupe, Convertible, GT, Shelby GT350. Original 289 Borg Warner T-10 4-SPEED MANUAL TRANSMISSION I.D. TAG. This is an ORIGINAL FORD TAG. Stamped [ HEK-AD-1 and (FoMoCo) ]. Removed from a 66 Mustang GT Fastback with 289 Hipo and 4-Speed. Absolutely Impossible To Find Original. Please email with questions. 042924-13 WE HAVE AN EBAY STORE WITH THOUSANDS OF ORIGINAL and NOS FORD PARTS. CHECK IT OUT.