At one time I had a master brake parts catalog that had a section with dimensions of parts such as wheel cylinders, master cylinders, shoes, drums, etc. I believe it got discarded when an assistant principal at the school where I was teaching decided to throw out the contents of some filing cabinets without consulting anyone. He trashed several decades' worth of repair manuals and parts books that were absolutely irreplaceable!
With a reference book like that. it might be possible to find a drum that would interchange, but I have no idea where one might be found. I believe that one was either for Wagner-Lockheed, or possibly Raybestos brand parts.
Jerry
