I have a 72 GMC 1/2ton 1500 4x4 pickup with factory clearance lights ( cluster of 5) and factory bucket seats. I have been trying to identify the model of this truck with no luck. Not very computer literate so my wife does most of the looking. The VIN number indicates a possible Heavy half ton or Big 10 due to the cab roof marker lights??? The side emblems are blank so would like to put correct ones on. It has a 350 with turbo 350. Am just starting to spruce her up but would like to know more about model etc? A friend told me that this was only available as a special order and that usually only available on 1 ton cabs. By the way, the roof marker lights are actually on molded in pedestals in the cab roof. Sorry to be so wordy, I'm brand new at this.