I have just purchased a 1996 peterbilt 357 that has an enclosed box in the back. My plan for the truck is to convert it to a motor home. I am really exited about the conversion just need to know how to register it as an RV. I have read several post about registering these commercial truck conversions as RVs in other states but have not seen any with the requirements needed in AZ. Are any of you guys firmillular with what I need to do? Any input is appreciated.