My uncle Clarence Harlow (Harlow Motor Co.) owned/operated a Ford dealership from the late 1930's until the early 1980's. I was in high school in the late '70's and distinctly remember the Sandbox edition Ford F150's. (some say they did the treatment to Bronco's too, but he never had any, as I recall). I believe that these trucks were ordered through a "conversion company" (like so many vans and other trucks have been through the years). Back then, I recall seeing both stepside and styleside "Sandbox" F150's on his lot. I drooled over them and lusted for one, but being in high school and NOT a child of wealthy parents, that was beyond reality for me. They had custom decals that looked like they'd been airbrushed on, white wagon wheels with the spoke openings shaped like a heart (kinda goofy now, but was cool back then!) They also had a "brush/grille guard and a bed mounted roll bar - typical styling for late 70's 4x4's. They were SHARP!