The 55 and 56 i believe chevy trucks were available with a cameo option. As such they are not noted in the VIN nor on titles.. they were a 3100 model truck. In 57 they became a model (3124) and were noted as such in VIN and titles.
Old Truck addict 1950 chevy 1 ton napco 1956 gmc 1 ton dually napco 1954 chevy 3/4 ton napco 1957 gmc civil defense napco panel