1969 Ford Mustang Boss 429 Black Jade

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The Boss 429 is one of the most legendary cars of the American muscle car era. The 429 cubic inch/7 liter engine with a modified hemi combustion chamber was one of the most exotic engines to find its way into a production road car during this period. These massive heads made the process of fitting the engine into the Mustang an onerous procedure, and Ford hired Kar Kraft to modify Cobra Jet Mustangs to accommodate the new engine.

The Boss 429 Mustang was actually used to homologate a completely different car, the Ford Torino Talladega, for the NASCAR circuit.

This particular car may have been the last to receive the rare 820-S engine with magnesium valve covers, hydraulic cam, and heavier connecting rods with 1/2 inch bolts. The more common 820-T engine used aluminum valve covers, a mechanical cam, and lighter connecting rods.

This car will be sold by Mecum Auctions in Monterey, California on August 18-20, 2016, right before the Pebble Beach Concours d'Elegance on August 21.

---- Specifications ----
Price -- Production 859
Engine 7 liter V8 Weight --
Aspiration natural Torque 450 ft-lb
HP 375 HP HP/Weight --
HP/Liter 53 HP/Liter Range --
0-62 mph -- Top Speed --
from Ford Press Release
  • KK no. 1480
  • Unrestored with 14,386 miles
  • Original paint and interior
  • Sold new at Bob Bales Ford in Morristown, Tennessee
  • Original 820-S NASCAR Boss 429 engine
  • Believed to be the last S-code NASCAR engine installed in a Boss 429 Mustang
  • 4-speed transmission
  • 3.91 Traction-Lok differential
  • Competition suspension
  • Front spoiler
  • Power steering and front disc brakes
  • Philco AM radio
  • Black Jade with Black
  • Deluxe interior
  • Bucket seats and console
  • Chrome Magnum 500 wheels
  • Original Goodyear Polyglas GT tires
  • Owners manual
  • Owners card
  • Build sheet
  • Previously part of a private collection from Mississippi

Seldom do you find a 47 year-old car that has only changed hands three times. But that’s the case with this 1969 Boss 429, KK1480, first delivered to its original owner from Tennessee’s Bob Bales Ford in 1969 and later to a collector in Mississippi, who maintained the original paint, original interior Mustang muscle car in a climate-controlled environment. Unrestored with 14,386 miles and still riding on its factory-supplied Goodyear Polyglas tires, the Black Jade Boss 429 has been out of circulation since the Carter administration. In addition to the low mileage and well-preserved factory paint and interior, production information indicates that this Boss 429 could have been the last example to receive the 820-S engine, as installed in the earliest Boss 429s on the Kar Kraft assembly line. The “S-code” powerplant came with a hydraulic camshaft, magnesium valve covers, and heavy-duty connecting rods with 1/2-inch bolts before production switched to the later and more common 820-T engine with mechanical camshaft, aluminum valve covers, and lighter rods. Of the 859 Boss 429s built for 1969, only 279 had the S-code engine. Like all Boss 429 Mustangs, KK1480 was built by Ford to homologate the hemi-head big-block for NASCAR racing. As a top-of-the-line performance car, it is equipped with the street 375 horsepower engine, 4-speed transmission, 3.91:1 Traction-Lok differential in a nodular case rear end, competition suspension with staggered rear shocks, front spoiler, power steering and front disc brakes, 15-inch Magnum 500 wheels with Goodyear F60x15 Polyglas tires and manually-operated functional hood scoop. Because the Boss 429 engine was too wide for the Mustang engine compartment, Ford enlisted its in-house performance shop, Kar Kraft, for the engine installation, which included modified shock towers. With only 1,359 produced during the 1969 and 1970 models years, an unrestored original like KK1480 ranks among the most coveted of all muscle cars and is documented with the build sheet, owner's manual and owner's card.