Replace your old booster firewall and linkage and replace with new parts. P/N: HWK8536-1. Brake Boosters. Disc Brake Kits. Disc Brake Upgrades. Mopar B & E Body. Mopar A Body 5x4.5. We specialize in performance brakes for late fullsize GM cars from 1955-70 and muscle cars from 1962-74,, Chevy, & Ford.