Just make sure the number with or without the letter on the title matches the frame number and letter or not exactly as the state inspector will check the frame number against the title. Motor number is not relevant per AZ only the frame number. AZ is a real pain in the rear on registering A's. Have to jack up body for inspector to see the frame number if there is one or will have to get bonded title with AZ's inflated value as basis for title cost. Had a clear title from MN, but still had to get bonded title since could not read the frame number. AZ inspector said as far as he was concerned was a stolen car no matter if had a title from another state or not and would run the number against stolen cars if had a frame number. MN also had a Pioneer Plate which only costs $28.00 once and register forever. MN felt you had paid enough in tags for the age of the vehicle.