Western Chassis 11063 - 1963-70 Chevy and GMC truck disc brake spindles allow you to upgrade your classic truck to disc brakes and bolt directly to the original ball joints. Made in the USA, these are the first disc brake spindles to hit the industry back in 1998. Over the years we have continuously improved the design to what it is today. These spindles are far superior to any modular spindle on the market. Be cautious of modular spindle failures as sonic testing proves Western Chassis' spindle is far superior and no porosity.