1965 Offenhauser 273!
The chrome air filter is a copy of the air cleaner Ford put on some of their hi-po engines, including 289 and 390.
I don't remember Offenhauser offering the finned cast aluminum air filter in the sixties. Not saying they didn't, but I don't remember ever seeing them. And I did pay attention.
The chrome air filter is a copy of the air cleaner Ford put on some of their hi-po engines, including 289 and 390.