Plymouth GTX
Introduced in 1967 as a luxury option in the Belvedere lineup, this model was on the same platform as the Coronet. But it was much more luxurious and had the 375 hp 440 V8 standard. Plymouth wanted the GTX to compete with luxury cars of the period, so they installed almost all possible creature comforts. It also had unique trim on the outside to distinguish the GTX from the rest of the lineup (via Hemmings).
The GTX was a gentleman’s hot rod with all options, nice interior and exterior details, and only one optional engine choice – the mighty 426 Hemi. The 440 Magnum was the standard engine. But if you wanted the ultimate Plymouth muscle luxury, you had to opt for the Hemi. Because it was significantly more expensive than the rest of the Mopar muscle car lineup, the GTX was never that popular. It’s quite rare today as a result.