truckernix,
The link I gave is to 1-ton brake parts through 1952 (I found this properly labeled in a different Chevrolet Parts book). Yes, 1953 was the first year for Bendix brakes for 1-ton. So, the link I gave above is not to a correct illustration (but, I cannot find a correctly labeled illustration for a 1-ton - your illustration is most likely correct for 1/2-1 ton)?