A K10 square body is put through tough work in a rural setting, with equipment and hands-on effort at the center of the job.

The square body truck was a microcosm within the greater history of the lovable pickup truck. It was essentially an era where Chevy — and later other auto brands — made trucks that had a square body.

Beginning in 1973, Chevrolet started to produce one of the most curiously named pickup truck lines in history. The Rounded-Line truck was the third generation of the Chevrolet and GMC C and K pickups.