1971 Plymouth GTX Overview

1971 Plymouth GTX Red - Front Left View Photo Though completely redesigned for 1971, this was the last year for the GTX model as a stand-alone, with only a manual transmission. Engine choices were 440 four-cylinder 440 with three two barrels (Six Pack), and 426 Hemi. Emissions restrictions, such as lower compression ratios and faster action choke operation lowered the base 440 of output by 5 hp (