On the ½ ton only of this one year of pickup, the hydraulic line coming from the master cylinder to the tee connection block on the right frame rail and the two rear axle cross lines, have a larger diameter than the lines in the remainder of the system. This can create some confusion when replacing the total system.
Enclosed is a paragraph from the 1954 Chevrolet shop manual explaining this change and a rough drawing that helps show the differences. It is important these dimensions are correct on the new lines when the instillations begin to save loss of time, money, and confusion when they do not fit the two tee connection blocks.
Front wheel lines bend back 180*
Front 
Rear
