In Arizona, where you live, if you have a title on an old vehicle, you just take the title in to get it into your name, not the truck. So in your case it would be no sweat. If the next owner after you does not like that the title does not match a number somewhere on the vehicle then you would have to explain what has been said about engine numbers. Not sure if you are wanting to get title into your name or you already have done that and are concerned about the serial plate/eng ID not matching? I assume you are talking about all this boded title stuff so you can get a plate that matches a title. First thing is get it into your name. DON"T go to the DMV. Go to a satellite office, nicer,easier but a little more money. DG's answer is how AZ handles bonded also. BUT it's usually for NO TITLE people. I believe after going thru all that, you still would not have a plate matching the title. Getting it re-serialized could be a nightmare. Everybody knows the DMV is a dangerous/annoying place, you could be opening a huge problem for yourself for no reason. You said you have a title, get it in your name and move on. If they give you a new title that should be proof nothing is wrong.(at least with that number). The DMV could say "that title is nice but we don't know it's for that vehicle, so we can't re-serialize it/fix door plate until you go back to all previous owners and..........so we will keep this title until you prove......"