The Boss 429, a “big block” version, was introduced in mid-1969 to homologate the “semi-hemi” 429-cubic-inch V-8 engine for NASCAR and NHRA drag racing. To meet the requirement of producing a minimum of 500 units for public consumption for series racing, the Mustang was chosen over the more fitting Ford Torino, despite the 429 being better suited under the Torino’s hood.
Kar Kraft of Brighton, Michigan, made significant modifications to fit the large engine into the Mustang’s engine bay, mainly to accommodate the massive headers. The engine, quoted at 375 horsepower, likely exceeded that, possibly reaching close to 500 horsepower. The Boss 429 was a serious machine, lacking flashy striping and eccentric decorations, except for the callouts on the front fenders. Only 859 units were produced in 1969.
This 1969 Ford Mustang Boss 429, one of around 850 made that year and designated Kar Kraft number 1412, was originally delivered to Thompson Ford in Cuyahoga Falls, Ohio. Finished in Candyapple Red, the car boasts features such as a front spoiler, vented hood, dual side mirrors, rear spoiler, Boss 429 badging, and dual exhaust outlets.
The interior showcases high-back bucket seats in black vinyl, a matching rear bench, color-keyed carpets, and simulated woodgrain appliqués on the dash, console, and deluxe door panels. It was equipped with the Interior Decor Group–Deluxe and Visibility Group packages, Traction-Lok differential, power steering, 15″ Magnum 500-style wheels, a Philco AM radio, a dash-mounted rally clock, deluxe seat belts, and courtesy lights for the glovebox, ashtray, trunk, and other areas.
Commissioned by Ford, Kar Kraft modified Cobra Jet Mustangs with a larger 429ci V8 featuring “crescent”-shaped combustion chambers. The factory specifications included an aluminum intake manifold and a four-barrel Holley 735-cfm carburetor, delivering 375 horsepower. Power is transmitted to the rear wheels through a four-speed manual transmission and a Traction-Lok differential.
This 1969 Boss 429, Kar Kraft No. 1412, is offered in excellent condition, providing a rare opportunity to own one of the most sought-after examples of one of the toughest Mustangs from that era. Bidding for this Boss 429 is currently available on Bring A Trailer with only 2 days left.
Source: Bring A Trailer
