Lot 40
1969 Ford Mustang Boss 429

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Selling on Wednesday

CHASSIS NO: 9F02Z195394

• Excellent example of Ford’s legendary big-block muscle car
• Impressive 429 cubic-inch, 375 HP V-8 engine
• 1 of 859 Boss 429 cars produced for the 1969 model year
• Accompanied by original dealer and delivery documentation, as well as a Marti Report


KK 1798

429 cid OHV V-8 engine with a Holley four-barrel carburetor, 375 HP, four-speed manual transmission, independent front suspension via coil springs and upper and lower wishbones, live rear axle with semi-elliptic leaf springs, front disc and rear drum brakes; wheelbase: 108”


In the 1960s Ford faced stiff competition from Chrysler in NASCAR competition. With increasingly open factory-based support provided to supposedly independent racers, Ford needed a new engine, but NASCAR rules specified that a minimum of 500 cars be equipped with the engine and be made available to the public. The Ford engineer’s solution was a new 429 cubic-inch V-8 with all-new, free-flowing cylinder heads, an aluminum high-rise intake manifold, a 735 CFM Holley carburetor, 11:1 compression, header-style exhaust manifolds, and a beefy four-bolt main block, conservatively rated at 375 horsepower.

The new 429 was fitted in to the tight engine bay of the Mustang, giving birth to the Boss 429, creating one of the most powerful Fords of all time. To handle the power, the rugged “Toploader” four-speed manual transmission and a 3.91:1 Traction-Lok rear axle were mandatory options. Other features included an engine oil cooler, a trunk-mounted battery with a special vent cap system, a competition suspension with front and rear anti-roll bars, power front disc brakes, and chunky F60x15 tires. The Mustang required special engineering and numerous modifications to accommodate the new engine (including cutting and relocating the shock towers) to fit the aluminum-headed big-blocks. Kar Kraft, the same outside shop Ford hired to build Thunderbolts in the early '60s, set up a special assembly line in Brighton, Michigan to turn out Boss 429s. It was there that Kar Kraft completed the assembly and installed the engine with its hemispherical combustion chambers (actually a semi-hemi design), big valves and a bulletproof bottom end. Other equipment on the Boss 429 included power steering, a unique KKX beefed-up competition suspension, staggered rear shocks under a unique rear sway bar (an American car first), and a four-speed close-ratio transmission with a 3.91:1 nodular Track-Lok rear axle. With a lofty price of just under $5,000, the Boss 429 was the most expensive non-Shelby Mustang to date and available in very limited numbers. A total of 859 Boss 429 Mustangs were produced for the 1969 model year to meet demand, awarded largely by sealed bids to hungry buyers. Ford reportedly lost $1,800 on every one built.

This Candy Apple Red Boss 429, according to its Marti Report, is 1 of 201 Boss 429 produced in this striking color. Completed by Ford contractor Kar Kraft on May 15, 1969, it was sold new at Cook Whitehead Ford, Inc., in Panama City, Florida. Every Boss 429 received a unique decal on the driver’s door with its “KK NASCAR 429” build number, this one being assigned KK number 1798. Included with the car are two shipping invoices, the Marti Report documenting that this is an authentic Boss 429 and copies of three last three owner’s titles date back to April 1982. Just looking at this Boss 429’s massive engine with its enormous hemispherical cylinder heads is enough to get any enthusiast’s heart pumping. Correctly restored from a dry Southern car, highly detailed and authentic, this rare and exotic Boss 429 presents beautifully and would make a stellar addition to any serious muscle car collection.