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Dubbed the "gentleman's muscle car," this model debuted in 1967 with a massive 7.2-liter V8 engine known as the "Super Commando 440" as the standard option.

Correct Incorrect The Plymouth GTX began as a high-end trim of the Belvedere and continued production until 1971. The "G" and "T" stand for "Grand Touring," while the "X" was added for a touch of flair.