Daniel, I have the build sheet on my car and it tohas the "air Clnr HD-731". My car is a 350HO-400 with a/c. Got the PHS documents on it. IT came with the dual snorkle air cleaner on it and it's still on it(can't believe I found this car in a junk yard!!). So....I believe some First Generation Birds did come with the dual snorkle air cleaner. Hope this helps .
