I just bought a 1973 C65. Tandem axle with hydraulic brakes. Anyhow I am pretty sure I'm going to be looking at new wheel cylinders. I cannot find any parts info online or a list of parts anywhere for part numbers. I don't have it apart yet but I sure wish I could start finding some part numbers so I can look around for what is available and prices on parts. I understand this might be a little later model that what is typically discussed here but I know there is a lot of knowledge around here on these trucks. I have a service manual on the way. I sure appreciate any info Thanks.