The truck I got has all the original paper work. In fact the owner was so through and did so much research as to what he wanted that he went to every truck dealer in the area and got the sales brochure, written quotes for what he wanted. He even figured out the theroretical speeds in each gear. When the grandson gave me the paperwork it had all of this. From Dodge, Chevy, International and Ford. He did the same thing with the camper. I have about a 6-10 inch thick file of all the info he collected. This guy was very through. He even kept a milage and fuel log for every mile he drove. It looks like this truck got between 10 and 11 MGP no matter where he went. A/C on or not.