Well, this is getting interesting. Looking at Gibson website, there are two different washers and part numbers. He list them for a pie pan and 70-71 six pack as PPW as a large washer. For a 69.5 and hemi he uses part no HACW, which I assume as smaller. Now he uses words like “ correct “ and “authentic “. The wing nuts are listed as “ correct style”.

Looking at Gibson site, there is only one style of wing nut for all air cleaners. My AAR was purchased in 77. It has the smaller wing nuts that look just like the one pictured above. My Superbird, purchased in 82, has the exact same small ones. I’ve got various other small ones purchased with with separate six packs intakes and carbs over the years. I do have one that is slightly bigger that is the same style. Not sure where it came from. I guess I missed “the wing nut thread”. Lol.