Many great classic cars and muscle cars begin as an option for an entirely different car before proving their worth in the auto industry. For some, it can take years to show just how popular the option could be as its own model, but for others, it becomes obvious very quickly that it should be much more than an option. The Buick Gran Sport is just one example of a car which originally began as an option, and in this case, the classic car 
When looking back at the history of muscle cars, one model stands out in American car-making: the 1969 Boss 429 Mustang. Though originally intended to compete with the Corvette, the Boss didn’t quite live up to Ford’s high hopes, and was discontinued relatively quickly after production continued from 1969 to 1970.
Each vehicle was hand assembled at the Kar Kraft facility in Brighton, Michigan. Production numbers were low, making each of the only 859 units just a little more special. In fact, some say that the Boss 429 may be the most valuable muscle car built in the 1960s because of its rarity.
