I know it is a 65. Not a 64.5 , I will get an authorized by state inspector do the inspection and get it retitled as a 65. Thanks for the inputAs a point of reference, new Mustangs sold in California in 1965 came from the factory with a PCV valve. Starting in '66 they came from the factory with the PCV and the Thermactor air pump. By the mid 1970's the NoX retrofit program attempted to have most all '66-'70 year model cars fitted with one of the "approved" NoX devices. That program was rescinded part way through the implementation so some cars got the NoX devices and some didn't. Fast forward to today and smog inspections for registration and transfer of ownership purposes no longer apply to pre-1976 year model cars.