Ford Mustang 1967 Triple Black GT K-Code Convertible

Only about 50 of the 44,808 Mustang convertibles Ford built in 1967 came with the rare 271-horsepower K-code 289 — and most of that scarce engine’s total production went straight to Shelby instead of regular Mustangs. That combination makes a documented, original K-code convertible one of the genuine unicorns of the pony car world.

There are many “1 of 1” cars in the Brothers Collection, including this very special 1967 Ford Mustang featuring a triple black color scheme and a 271 horsepower K-code 289 V8 under the hood. Although there were 50 K-code convertibles built, this might be the only one with the black deluxe interior and a black exterior and top.

Fifty. That’s how many 1967 Mustang convertibles left the factory with Ford’s rarest engine option — out of nearly forty-five thousand convertibles built that year. The math alone makes this triple-black example a genuine unicorn, but the story behind why so few exist is even more interesting than the numbers suggest. Most of Ford’s most powerful small-block engines that year didn’t even end up in regular Mustangs at all. So where did the rest of that horsepower actually go?

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A Rare Engine Made Even Rarer

Ford built only 489 K-code 289 HiPo engines across every 1967 Mustang body style combined — coupes, fastbacks, and convertibles — making it the rarest engine code offered that year. Against a total 1967 convertible production run of 44,808 units, the roughly 50 K-code convertibles represent a sliver of a percent of all droptop Mustangs built, a scarcity that’s only gotten more pronounced as decades of neglect, modification, and simple attrition have thinned the surviving population further.

Where the Rest of the Horsepower Went

Much of that already-scarce 1967 K-code production wasn’t destined for showroom floors at all — a significant share went straight to Carroll Shelby’s operation for conversion into Shelby GT350s, leaving even fewer high-performance 289s available as regular-production Mustangs. That context makes a documented, unmolested K-code convertible like this one — triple black, deluxe interior included — less a "nice classic Mustang" and more a genuine survivor of a production choice Ford essentially stopped making once the bigger 390 and 428 engines took over as the performance option.

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