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gas filler neck

  1. does gas filler neck from a Mustang fit Cougar?

    Classic Cougar Tech
    I believe that I read here that a Mustang filler neck will NOT work on a Cougar. is that correct? I replaced the gas tank on my 1970 California spec Cougar with a non-CA tank and have removed all of the vapor assemblies. but, how do I find a vented gas cap and make it work? all of the...