Story
1967 Plymouth GTX 426 Hemi
Plymouth introduced the GTX for 1967 as its premium intermediate performance car. The 440 Super Commando was standard, while the 426 Street Hemi was the rare, expensive alternative: 425 horsepower, 490 lb-ft, two four-barrel carburetors, and 10.25:1 compression.
Hemi buyers could pair the engine with a floor-shifted A833 four-speed or TorqueFlite automatic. The factory performance brochure identifies the heavy-duty 8.75-inch rear axle with the automatic and the 9.75-inch Dana 60 with the four-speed. GTX suspension used heavier torsion bars and rear springs with a front anti-sway bar; enlarged drums were standard and front discs were optional.
The first-year GTX mixed that hardware with bucket seats, a 150-mph speedometer, simulated hood scoops, a blacked-out grille, an argent tail panel, GTX badges, and a flip-open fuel cap. Hardtop and convertible bodies were offered, with optional console, tachometer, sport stripes, vinyl roof, road wheels, and a broad paint and interior palette.
The cited Chrysler-record summary reports 733 U.S.-spec Hemi GTX hardtops and convertibles; a separate period-car account reports 312 four-speed cars. Other published totals conflict, so body-style and complete transmission splits remain open research items rather than false precision.
Authentication starts with an RS23J7 hardtop or RS27J7 convertible VIN pattern and agreement among the VIN, fender tag, broadcast sheet, engine and transmission stampings, axle, paint, trim, and options. GTX trim or an installed Hemi cannot establish an original Hemi GTX by itself.