in 1974, Plymouth made around 5000 trucks, the Trail Duster (Not to be confused with the Plymouth Duster car) and they made more in 1975 and 4255 in 76

All of the first-year Ramchargers and Trail Dusters had 4×4 powertrains. A 4×2 version was added for 1975. In addition to being driven only by its rear wheels, the 4x2s road 2½ inches closer to the ground.

The Pick of the Day is a ’76 Trail Duster Sport 4×4 advertised by a dealership in Redmond, Oregon

three V8s were available — a 318cid, a 360cid (only in California) and a 440.

 the Sport option package included front bucket seats, color-keyed interior door panels with map pockets, a center console with removable styrofoam cooler, windshield moldings, and unique bodyside, tailgate and interior trim. .

https://journal.classiccars.com/2019/04/06/remember-plymouth-remember-its-suv/