General Motors has building flashy muscle cars since 1964 with their GTO’s, Chevelle’s, Olds 442’s and Gran Sports and Plymouth wanted a piece of the action. They had the engines; they just didn’t have the look. That all changed in 1967. Plymouth took a “plain Jane” Belvedere and turned it into a handsome and highly competent muscle car. They called it the GTX. The exterior was dressed up by adding sport racing stripes, hood scoops, a...

The GTX along with all the mid-sized Plymouths and Dodges was restyled in 1968. This is the classic design that all muscle car lovers picture when they think of mopar muscle. The lines were smoothed and contoured to provide graceful transition from the front to the rear of the car. The new look was well received and sales were up considerably over the previous year. The GTX was still the top-of-the-line midsized Plymouth.  As with the...

Changes to the GTX were relatively minor in 1969. The grill and the taillights were updated. A flat black treatment was added to the rocker panels and was accentuated with a thin red pinstripe. Above the black paint was a chrome strip that separated it from the main body color. The hood also had dual scoops. The Air Grabber option would make the hood scoops functional and allow the delivery of fresh air to the...

For 1970, Plymouth updated the grill and the rear. Of all the front end treatments of this body style, the 1970 grill looks the best. Other changes included an updated hood with a much cleaner looking hood scoop. On the rear quarter panel a simulated scoop was added that detracted somewhat from the clean lines of the previous year. After four years, Plymouth finally added a third engine option to the GTX. Now buyers had a...

The GTX was completely redesigned for 1971. Plymouth compared it to an aircraft fuselage. The front end was low with a rap around bumper that did look like a jet engine intake. The rear sat higher than the front and made the car look lit it was moving even when sitting still. Performance was still good considering the overall environment of 1971. The engine choices were carried over from 1970. The engines were some of the...