Check out this link to 1948 Chevy "Servicing Truck Cabs" posted by Brad Allen. Scroll down to Section 8 for some helpful pictures and tips on the cab vents. Oddly the Chevy Master parts books don't list any hardware for the AD series vents controls. The last trucks that list the hardware are 1941-46 Art Deco trucks.

Hopefully the pictures may provide some help in finding what will work for you. Others will be along soon to help out with what they may have used. wink


~ 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)