I have found the easiest way to get a title in AZ is to go with a bonded title,I have used this method 4 times now it it works great, you are supposed to write a letter to the last know owner asking for a title, what I do is write the letter to someone I know is dead, then it gets returned to you and you take it to the DMV with your bond and your police inspection and they make you a title, it's a little drawn out but it's the best I have found. You can go to your DMV and they will give you a list of everything you have to do. Good luck with your project!