I went to the state referee station this morning "Get Ready"! I was told that the State of Arizona will be enforcing the Federal Clean Air Act. Which means "NO" engine swaps what so ever. Same brand, year of vehicle only. No Grand Fathering either. Was told if you've had your swap for 5 years and you go the emission station and they say something isn't in compliance and send you to the state for compliance you will be in violation of Federal Law and you won't get your tags. Mind you this is for the city areas that mandate emmission testing. somebody please tell me I'm wrong! sorry matt