On the frame in several spots the vin# will be stamped in it.Take that to the dealer and have them run it, and get a build sheet, or as International calls it, a line setting ticket for the truck, and that should take care of that.I had a friend that had a truck that was put together with different parts, and he got stopped in Jersey.Well, the DOT officer just happened to notice the different serial #'s everywhere,and to make a long story short, it was a huge mess.They wouldn't let him move.Replaced cab....was it a rollover?makes me wonder.