1965 Dodge Dart Charger

I'm standing on the dozens and dozens of air cleaner lids passing through my possession and scrutiny over the years when I say I disagree with you. But not all the slant-6 lids are exactly identical to each other and (as we can see in the photos in this thread) the same is true with the 273-4bbl lids. I think we're running up against the same thing 65DartCharger is running up against: minor differences in a high-volume part sourced from different stamping plants and production dates.