You can run a newer motor , or newer injection setup if it all looks right . Hossbaby50 ( Harley ) passes AZ smog with TPI in his 85 .
They could care less as long as you have what you need , like EGR etc .
I can't wait for the state and EPA to get the older vehicle exemption thing done . Its coming :
In 2005 the Arizona Legislature passed House Bill 2357, which amended the Arizona Revised Statutes (ARS) at § 49-542 to authorize the exemption of certain collectible vehicles and motorcycles from being subject to the emissions testing requirements. The legislation exempts collectible vehicles in the Phoenix testing area and collectible vehicles and motorcycles in the Tucson testing area, pending approval by the U.S. Environmental Protection Agency (EPA).