Boss 429 Mustang. The Boss 429 is arguably one of the rarest and most valued of the muscle car family. In total there were 859 original Boss 429s made. The origin of the Boss 429 comes about as a result of NASCAR.
Boss 429 Mustang. The Boss 429 is arguably one of the rarest and most valued of the muscle car family. In total there were 859 original Boss 429s made. The origin of the Boss 429 comes about as a result of NASCAR.