Plymouth built exactly five 1971 ‘Cuda 440-6 four-speed convertibles, out of only 17 six-barrel convertibles made that year at all. The combination arrived just as insurance surcharges and emissions rules were strangling the muscle car era, making this one of the rarest regular-production Mopars ever built. Surviving examples now sell for anywhere from $400,000 to well over $1 million.
A 1 of 5 made 1971 Plymouth ‘Cuda 440+6 4-speed convertible. With all the great features, styling, and performance, you’d think there would have been millions of these cars sold!
Plymouth built exactly five of these — not five hundred, not five thousand, five — and that number alone should stop anyone scrolling past this photo. A 440-6 4-speed convertible sitting on a dealer lot in 1971 was not just rare, it was already close to invisible the day it left the factory, arriving right as the muscle car era was quietly dying around it. Insurance surcharges, tightening emissions rules, and a buying public that had moved on all conspired against cars exactly like this one. So how did something this specific ever get built in the first place, and why does that scarcity matter more today than it did in 1971?
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A Six-Barrel Convertible, Barely Built at All
Plymouth’s 440-6 (440 cubic inches, triple two-barrel carburetors) was the Barracuda/’Cuda’s second-hottest engine option behind the 426 Hemi in 1971, and it almost never went in a convertible. Of the 254 ‘Cudas built with the 440-6 that year, only 17 were convertibles, and of those 17, just five paired the drop top with a 4-speed manual, making this exact combination one of the rarest regular-production muscle cars Chrysler ever assembled.
1971: The Year the Music Stopped
Total Barracuda production collapsed to 16,492 units in 1971 as rising insurance premiums on high-horsepower cars, tightening federal emissions standards, and a shifting market pushed buyers toward smaller, tamer cars. A 440-6 convertible built into that environment was not chasing volume; it was one of the last full-send muscle car orders Plymouth would fill before the segment cratered entirely.
Why Five Copies Command Seven Figures Today
Scarcity like this does not stay a secret. Surviving 440-6 ‘Cuda convertibles now change hands anywhere from roughly `$400,000 to well over `$1 million depending on condition and originality — a direct reflection of how few were built and how few have survived matching-numbers intact. Mopar collectors specifically hunt for the fender tag and broadcast sheet on cars like this, since the 440-6/4-speed/convertible combination is rare enough that provenance paperwork alone can move the needle on price by six figures.
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