I did some work recently on a 57 Cameo that was a restored original. It had a 235 with a 3 speed, standard heater with the regular switch, radio delete, no backup light switch, and no turn signals. It did have all the window trim and other chrome trim. I'm fairly sure that you could order them bare bones or loaded depending on how much a person wanted to spend. Since they were almost double the price of a regular truck, most people didn't want to spend that much on a "truck". Of course we upgraded this one with an OD, turn signals, delux heater switch, back up lights, etc.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine