In January of 1969, Ford Motor Company started production of the 1969 Boss 429 Mustang. Featuring the stock Nascar version 429 engine. The cars were actually built by Kar-Kraft at the KK-Brighton assembly plant, located in Brighton, Michigan. Each vehicle was hand assembled. 1969 production ran from January 1969 through July 1969. Total units produced: 859. This includes 2 - 1969 Boss Cougars. 1970 production started in August of 1969 and ran through December 1969. Total units produced: 500.This includes 2 - 1970 Quarter-Horse Mustangs. Total production for the Boss 429 Mustang; including the two 1969 Cougars and two 1970 Quarter-Horses: 1359 vehicles.

1969 Boss 429 Mustangs were available in the following five colors:

• Raven Black [A]
• Royal Maroon [B]
• Black Jade [C]
• Candyapple Red [T]
• Wimbledon White [M]
• Interior trim code: DAA black

1970 Boss 429 Mustangs were available in the following five colors:

• Grabber Blue [J]
• Grabber Green [Z]
• Grabber Orange [U]
• Calypso Coral [1]
• Pastel Blue [N]
• Interior trim codes: TA black & TW white

All vehicles, except for a handful of prototypes and a couple of factory drag cars; were completely assembled & fully dressed with thermactor pollution equipment, power steering, & exhaust manifolds. The cars were required to go through a complete final inspection for equipment verification and certification prior to final shipment.

Each vehicle was assigned a KK 429 Nascar production number.
Starting with KK-1201 running through KK-2558.