Number and Facts Virtuallyevery day we receivenumerous phone calls from Mustang ... who arecurious as to just how raretheir classic Mustang might be. One ... measurement of rarity, of course, is how many similar Mustangs ... Mustangs by body type. Thereare no records available for 1964-1/2 through 1966 ... tangs. They do charge a fee fortheirreports but the pricesareveryreasonable and ... when documenting your Mustangfs rarity. Quick Production Facts 03/09/64 ... passenger seat 06/01/64 Shelbyfs revamping begins 07/13/64 Production begins San ... Jose, California assembly plant R 07/31/64 Last documented 1964-1/2 08/01 ...