The Mustang Boss 429 is one of the most unique Mustangs made. Its uniqueness lies in its rarity, its engine and simply for the fact that so much effort went into modifying the basic Mustang to make the Boss 429 engine fit. In 1969, muscle car fans, and specially Ford fans, thought that the 1969 Ford Mustang Boss 429 would be the Mustang to finally rival the best of the Corvettes.
