The JB8 is the large brakes on 1-tons with dually,s. The rear drums are 13x3 1/2 & uses hydra-boost power brakes. THe JB7 has 13x21/2 rear drums & vacuum booster. All these are too large for a 1/2 ton truck.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne Super In the Gallery Forum
