The “win on Sunday, sell on Monday” philosophy seems to have disappeared from the world of automotive marketing. However, it is a game that Ford played effectively in 1969. It produced the Mustang Boss 302 for Trans Am competition. The Mustang Boss 429 was a different beast, designed to humble the NASCAR opposition. Our feature Boss 429 is a stunning classic that has seen its share of show action. It presents superbly, and comes with a welcome bonus to sweeten the deal. I must say a big thank you to Barn Finder Curvette for spotting this Mustang listed here on eBay in Schomberg, Ontario, Canada. Bidding sits below the reserve at $50,099, but there is a week remaining in the auction for interested parties to stake their claim on this classic.

This 1969 Boss 429 perfectly explains why Ford increased the First Generation Mustang’s dimensions with each update. The company wanted to fit larger engines under the hood, but early cars were hampered by their dimensions. The second update occurred in 1969, which is when this Boss rolled off the line. Ford offered buyers some pretty “in your face” paint shades, but this car’s first owner selected the restrained and classy Royal Maroon. Due to the car’s mechanical specifications, they effectively created an iron fist wrapped in a silk glove. The seller states that the Mustang has previously featured in magazine articles and has travelled the show circuit. The deal includes Mustang Club of America judging certificates, with the seller’s images confirming that the Boss remains in “show” condition. There are no cosmetic flaws, the paint reflects its surroundings like a mirror, and this beauty is rust-free. It features desirable Sport Slats on the back window and rolls on its correct Magnum 500 wheels.

Ford’s drive for competition success proved the catalyst for the Boss 429. The V8 under the hood was effectively a racing motor for street use, featuring four-bolt mains, a forged steel crank, steel conrods, aluminum cylinder heads, and a humongous Holley carburetor atop an aluminum intake. The factory quoted power and torque figures of 375hp and 410 ft/lbs in its Sales Brochure, with many people believing that both numbers were significantly understated. Rounding out this package are a four-speed manual transmission, power steering, and power brakes. The figures Ford quoted are irrelevant in this case. This Mustang’s engine bay houses a date-correct 429 Service Block, which the seller rebuilt with NASCAR-spec components. They had it dynoed, returning an impressive 600hp. Don’t think it’s highly strung, because it produces its power on pump fuel and possesses what the seller describes as excellent street manners. Potential buyers can consider this Boss a turnkey proposition.

Would it be fair to say that the only thing better than a Boss 429 motor is the chance to own two of these potent powerplants? That is the opportunity presented here, with the seller including what they describe as a “sister” motor. It started its life in another Boss 429, and, while complete, it was dismantled so potential buyers could inspect it and confirm it contains all its correct NASCAR components. I won’t call it a “once in a lifetime” opportunity, but it isn’t something that happens every day.

The theme of spotless presentation continues inside this Mustang, with its interior trimmed in Black vinyl. As a show-quality classic, there is nothing deserving criticism. The trim is immaculate, the dash and woodgrain items are spotless, and there are no visible additions. This Mustang might have performance leanings, but the console, radio, and rimblow wheel add welcome touches of luxury and comfort.

Writing for Barn Finds is an honor for someone with a driven passion for classic cars, and having the privilege to write about cars like this 1969 Mustang Boss 429 is unforgettable. Its desirability is unquestioned, and its presentation is seemingly faultless. The listing statistics demonstrate that many people share my feelings about this Mustang, and with a week remaining, I suspect that the action will intensify. I believe that it will find a new home, and it will be fascinating to discover what you might consider paying for this potent beast.