Hey Ron if you are going that far to bring back the air cleaner, alittle info from a very knowledgeable club member named Darren told me the set of letters on your build sheet in box #91 (engine tune label) has to match. All 3 have to read the same 2 letters, build sheet, air cleaner and top of rad (emission) stickers. If its "AU" they are going to be a PIA to find! Mine up here are all AU. Let us know how you make out!