Also known as the Plymouth Belvedere GTX, this model was intended to be a “gentleman’s” muscle car. Assembled in St. Louis, Missouri, the production only lasted 4 years (from 1967-1971). Both the style and performance of this model were better than the original Belvedere, and the two were largely differentiated by the grille and look of the rear of the car. The 1967 Plymouth GTX had mock hood scoops, optional racing stripes, and a different fuel cap, which also set the two classic car models apart.
Without an engine upgrade, the GTX went 0-60 miles per hour in 6.5 seconds and had a 15.2 second quarter-mile, at 97 mph. The car came with the standard 440 cu. In. V8, which was called the “Super Commando 440.” A 426 cubic inch Hemi engine was also available. With that, the 0-60 time was 4.8 seconds with a quarter mile time of 13.5 seconds at 105 miles per hour. Two transmission types were available, a 3-speed automatic and a 4-speed manual.
Though originally the two-door coupe was a success, sales began to suffer with the introduction of the Plymouth Road Runner, and further declined after the Road Runner offered a convertible body style in 1969 After a handful of redesigns, the GTX still did not bounce back. In its final year in 1971, fewer than 3000 units were produced. For the next two years, the GTX instead became an optional package for the Road Runner.