what's the question? should be able to find answers here - it was available 55-early 58 only .... some details shown in the assembly manual .... aside from the plastic bedsides and rear treatment, the Cameo is only different from the 3100 pickup in a few trim details, and there's no indicators in the truck ID to prove it's a Cameo, except that the 57 had special fender spears [3124 instead of 3100] .... some repro parts are available at Jim Carters
Bill