The Boss 429 could well be among the rarest and many valued muscle cars up to now. As a whole there have been 1,358 Boss 429s made. The foundation from the Boss 429 happens due to NASCAR. Ford was trying to create a Hemi engine that may contend with the famed 426 Hemi from Chrysler in NASCAR's Sprint Cup Series (then referred to as "Grand National Division"). NASCAR's homologation rules necessary that a minimum of 500 cars be fitted with this particular motor and sold towards the public. After much consideration, it had been decided by Ford how the Mustang will be the car that could house this new engine.
The Boss 429 engine was based on the Ford 385 engine. The Mustang's body however wasn't wide enough to encompass the large Boss 429 engine and thus, Ford hired Kar Kraft from Dearborn, MI to change existing 428 Cobra Jet Mach 1 Mustangs to correctly fit the brand new Boss 429 engine. Kar Kraft was contracted by Ford to produce the Boss 429, because Ford was stretching itself thin across numerous projects. Kar Kraft at that time is at the entire process of creating the Trans-Am Boss 302.
In 1969 there have been 859 Boss 429s produced by Ford Motor Company. There have been five different colors obtainable in 1969 (Raven Black, Wimbledon White, Royal Maroon, Candyapple Red, and Black Jade) and also the only color for that interior was black. The hood scoop was exactly the same color since the car. Each one of these cars were a manual transmission there wasn't any ac available because of the size the engine.