Today in the garage we talk about how a brakes systems proportion valve, hold off valve and combination valves commonly found on classic Camaro, Chevelle, Nova and Chevy Trucks work. Also shown are combination valves finish options when purchasing a 4 wheel disc brake conversion. Disc Brake Conversion link: https://fpautoparts.com/disc-brake-co... Proportioning Valves link: https://fpautoparts.com/valves-blocks/ Check out our website https://www.fpautoparts.com Follow us on Social! / firstplaceautoparts / firstplaceautoparts / first-place-auto-parts / firstplace_auto