BC,

Something like this???

https://www.steelerubber.com/air-cleaner-lid-gasket-20-2699-20

IIRC, "Steele" rubber products are some of the best available. Understood the link says for "ferd" applications, but it's cut-to-fit, glued in place, and should compress just fine for what you need.

Hope it's helpful. thumbs_up


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)