1966 Ford Mustang C-code Convertible 289 CID Windsor V-8 engine (code C)C4 Cruise-O-Matic Three-speed automatic transmissionRed exterior (code T) with black, power-folding top and red vinyl interior (code 25)GT exhaustPower steering and discs brakes in front If you?re still searching for that special Ford Mustang droptop from the car?s first-generation, you should check out this new arrival at MotoeXotica Classic Cars, a simply stunning, nicely restored 1966 Ford Mustang C-code Convertible! This pony was built at Ford?s Dearborn, Michigan factory (VIN code F) on June 20, 1966 (code 20F) and it was delivered originally to the Indianapolis, Indiana region for sale (code 34).