"non-smog" 400's came with louvered chrome "pancake" style air cleaners. Both the base and top were chrome.
However, I believe I was told the CA smog 400's came with the regular black snorkle base with a chrome lid.
I have an original CA Black/Yellow plate 67 400. I pulled the smog pump a long time ago (but kept it). If you can post a photo, I can compare your setup to how my car was when I bought it. I cannot post my photos as I took them with a 35mm camera. I cannot confirm the correct original air cleaner as my car had an aftemarket Edelbrock one on it at the time of purchase.
I do know that there were unique aluminum plates that bolted to the front of both cylinder heads and I have those along with the pump, backfire valve, and smog pump. I had to remount the passenger side plate as it also serves as the PS pump mounting bracket.
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
