There still can be cases of "the car is from California" that are different from "the car was originally built for California".
Did it have the A.I.R. smog pump on it? Do you have PHS documents that show the car was 1st sold in CA?
If so, then I hope you have some cash reserves on hand, 'cause there were only 1500 or so cars that fall into this catagory and finding the correct CA smog air cleaner is going to be a tough search. It looks like the chrome lid is reproduced, I found one over at PY's site.
The correct air cleaner looks a lot like the one listed on the web page below that is labled "1965 GTO AIR/California air cleaner":
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
