It would be easier if the truck hadn't changed hands already and was still with the P.O. Was the truck currently registered or was it registered in the last ten years? If it hasn't, then use a service like I did, the numbers won't be in the system after ten years and they can issue you a new title in your name with the numbers on your body tag. I have seen body tags with both the engine number and the serial number on them, probably due to this same problem.