I was looking up the part # for the air filter in my 1972 parts book when I noticed that Chrysler and Imperial have a different part # than Plymouth and Dodge for the big block air filter. Do they use two different air cleaners?
Some photo's of air filters and air cleaners, the orange filter and the black are the same in size. The larger orange air filter seems to fit the early style air cleaner so I'm not sure why it's listed in my 72 parts book. Sorry about the quality it was dark and cold in the storage area.