Plymouth sold only 1,815 units equipped with this powerplant. However, it's not just the engine combo that can make a 1970 Road Runner rare. The convertible body style was also in low demand.

Convertible SUVs are not the most ... a removable soft top and dashes of luxury. The Trail Duster is the first and only SUV produced by Plymouth and now has an average used price of $27,427 ...

But among all his rides, the first one he ever bought, his beloved 1968 Plymouth GTX convertible, stands out as the true catalyst for his muscle car obsession. The 1968 Plymouth GTX convertible ...