Vent windows in doors are introduced. Outside door handles are still turn-down type. Only year with vent windows and turn-down handles. Mid-year change from 9 board bed to 8 board bed. Last year for 80 mph speedometer. Last year for chrome window handle knobs and chrome wiper knob. Serial #'s JP 1/2 ton, JR 3/4 ton, JS 1 ton, etc...