First thing is if you have a VIN tag/Serial plate on door jamb you are lucky. That is the number that should describe your truck. Post that number. So far it seems you have a 250-24 1 Ton. Should have a 248 Cu in motor unless replaced or "special order". There is a GMC FC 253/263 possibly. Not sure.
1 Ton is shown as GVW 8800. Maybe someone misread/mis stamped something. Again not sure. Need VIN from door jamb. Titles are frequently misleading in those eras. Especially GMC.
Check for emblems of any kind. Check stampings/casting number on motor.
People in the know will go by lug pattern, wheel size, axle size, spring size and other physical features to identify. So a couple of pics and some specs won't hurt. Duals? Stake? Dump? Flatbed? Wheel base?
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
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