Granddad had one of approximately that vintage. I don't know the exact year, because I was a kid (he died in 1991). It was that same color. Late 70s Chevy "Custom Deluxe". Single-cab, beige, manual gearbox, tobacco-colored vinyl bench seat that I slid around on when he went around corners. Not sure what engine. Mud tires on the rear only. A lot of people did it that way back then.
It had the name of the dealer stamped on the back bumper like that, but the stamping was painted red.
I still remember what it smelled like inside. King Edward cigars (he always had a box on the seat), old man aftershave, rusty steel, and Mississippi Delta earth.
My mom hated it when I rode with him. She thought he drove recklessly. She worried too much. The old man and I had a ball driving around the small town of Greenwood, MS. running errand and seeing friends of his.
I wish I had that truck.