Plymouth GTX classic cars for sale

History of the Plymouth GTX

The Plymouth GTX debuted in 1967 as Plymouth’s answer to the growing demand for mid-sized American muscle cars with a touch of luxury. Officially known as the Belvedere GTX upon launch, the model bridged the gap between pure performance and comfort, targeting buyers seeking a refined powerhouse. The GTX remained in production until 1971, retaining its place as the brand’s top-level muscle car, thanks to its superior trim and mechanical upgrades over the base Roadrunner. Its enduring presence on drag strips underscored its reputation as a formidable competitor and a statement piece of the late ’60s and early ’70s car culture.

Model history

GTX production ran from 1967 to 1971. Notably, the GTX occupied a slot above Plymouth’s more spartan Roadrunner in both performance and trim. The standard power plant in most years was the 440 cubic inch (7.2-litre) V8, pumping out 375 hp, with optional upgrades, including the legendary Hemi engine in certain years. The coupe body style dominated, and many cars featured distinctive vinyl roofs and upscale interiors, setting them apart visually and materially from lesser models. The project’s roots lie in the Belvedere series, and the GTX name disappeared after the 1971 model year, with Plymouth’s performance focus shifting to other lines.

Highlights of the Plymouth GTX

The Plymouth GTX delivered distinct performance and styling in the muscle car class. Its ‘Coke Bottle’ sculpted sides, exclusive trim, and well-appointed interior made it immediately recognisable. Unlike the basic Roadrunner, GTX buyers enjoyed decorative details, better seats, and additional equipment. Many carry their original colour finishes, V8s, and vinyl roofs. And technical documentation like Fendertags and Buildsheets often survives.

Technical data

Special Editions and Collectible Models

Special editions of the GTX included models featuring the 426 Hemi engine, manufactured in limited numbers and now highly sought after. Factory original cars with matching numbers, unique colour combinations, and preserved documentation like Fendertag and Buildsheet are especially prized. Additionally, original American Vintage wheels and rare interior materials add to a car’s collectible status.

Weak Spots and Common Issues

Spare and replacement parts are widely available, including interior trim, bumpers, glass, electrics, and vinyl roofing. Buyers should look for cars with complete documentation (Fendertag, Buildsheet), genuine engine and ignition components, and original finishes. While classic Mopar models are generally robust, attention should be paid to rust in body panels and undercarriage, mechanical wear on the driveline, and the condition of original interiors.

Engine, Performance, Transmission and Handling

The 440 cubic inch V8 delivers stout, linear power, making the GTX a favourite at quarter-mile races globally. With 375 hp in standard form and up to 425 hp with the 426 Hemi, acceleration and top-end performance are instantly noticeable. The improved suspension, steering, and braking compared to the Roadrunner ensured better road manners, though handling is classic muscle car—firm ride, straightforward feedback, and a focus on straight-line speed. - GTX 440 (1968–1970): 7.2L V8, 375 hp

• GTX Hemi (select years): 7.0L V8, 425 hp Both coupe configurations stand out for their blend of performance and luxury.

Interior, Comfort, Exterior and Design

The GTX is distinguished by its ‘Coke Bottle’ styling, featuring muscular flared fenders and an aggressive stance. Vinyl roofs and original paint colours typify surviving examples. Inside, the GTX came with improved upholstery, detailed trim, and an upscale dashboard—all upgrades over the more spartan Roadrunner. Special accessories, including period wheels and detailed badging, reinforce its premium position in the muscle car hierarchy. Buyers often seek examples with original seats, dash components, and upholstery for authenticity.

Other notable features

The GTX was frequently delivered with original Fendertags and Buildsheets, offering exact details about the build specs—a significant plus for authenticity and value. Many models retain their original production wheels and accessory kits, prized by collectors and restorers alike.

Summary

The Plymouth GTX embodies the high-performance, luxurious muscle car ethos of late-1960s and early-1970s America. With its exclusive blend of solid V8 power, improved interior comfort, and visually distinct touches, it was—and remains—the definitive top-tier Plymouth muscle car of its era. Surviving examples are well-documented, maintain high enthusiast demand, and offer a compelling experience for those seeking true Mopar power with refinement.