We’re all familiar with the Shelby Cobra story. The one where a Texan chicken farmer hits on the genius idea of stuffing a big V8 into one of them pretty and light, but under-powered British sports cars. But less well known is that Shelby almost certainly got the idea after driving another Anglo-America V8 hybrid an entire decade earlier.

That car was the Allard J2X, which Carroll raced multiple times between 1952 and 1954 before being snapped up by Aston Martin for its own endurance racing program, one that would eventually net Aston the 1959 World Sports Car Championship with the help of Shelby and other top drivers.

But what is an Allard? Starting in the late 1940s, London-based Sidney Allard’s firm produced a small number of sports cars and convertibles powered by Ford’s flathead V8. But then Allard spotted an opportunity to grow his business by tapping into the post-war U.S. market for lightweight sports cars that Detroit’s automakers were ignoring.

Allard J2s featured simple aluminium bodywork with cycle fenders, but rather more advanced coil spring suspension, inboard rear brakes and de Dion rear suspension. Export cars also got a much more powerful American V8 engine from a choice of suppliers, but often Cadillac. It was a potent combination, and not just in a straight line. A J2 came third at Le Mans in 1950.

The J2 was followed by the J2X, “X” in this case standing for “extended,” a reference to the redesigned front suspension that allowed the engine to be moved further forward, while the nose was also longer and stuck out beyond the front wheels, as seen on this 1952 example that’s currently up for grabs on the Bring-a-Trailer auction website.

Powered by a 331 cu-in. (5.4-liter) Cadillac V8 that slurps air through three Stromberg carbs mounted on an Edelbrock intake, it’s equipped with a four-speed manual transmission and red-painted wire wheels wrapped in vintage-style Dunlop Racing rubber.

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