True,the older trucks had six lug wheels,even the 1/2 tons.I believe the 3100 designates a 1/2 ton short bed.I think the 3200 was the long bed. If I am wrong someone will correct me here.Long or short ,it all depends on what you like. The short ones seem to have more value. As far as the spare tire mount on the side,most people do away with them,but for originality you would want to keep it.
