One of our Midwest Firebirds club members is looking for an original '67 326HO air cleaner. Here is his description of the one he is looking for: "I have a 67 326 4 barrel carb in need of the original H.O. air cleaner, as such looks as original 2 barrel air cleaner, but the snorkel out of air cleaner is oval and flatter in appearance not tubular as in the 2 barrel snorkel." "If you were to google 67 firebird H.O. one should be able to see the original type that I require. Not an easy one to find, not flat chrome pancake type as in 400 engine."