[Clavo106]

silent bob? .. lol.. I would be with evey one on this and look at the door jam vin and frame vin right under the cab top rail and also located by gear box steering.. I would be guessing by its a older model frame it being drums around but its all option I believe.. if its manual steering I would shoot its a 67 because of the frame dimple.. the cab would have a vent on the door jame 71+ ... the 67 chevy have frame vin stamps on the frame. I own one .. I believe the gmc do not.. since I do not own a gmc I can't verify.. but I also own piece up trucks.. good luck..