Otto - Not sure where your getting your info on self-adjusting brakes , but Chevrolet started using them as standard equipment in their trucks in 1951 with the introduction of Bendix brakes.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "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)