Need brake dimensions...

I went to the Performance Suspension Technology (PST) site because I want to purchase a complete brake rebuild kit. They have a note that says; "brake drum inside diameter and brake shoe width" are required to place an order. Does anyone know what these dimensions are, and are 1973, 4-door Dart Custom brakes the same as on a 1974 Dart Swinger? I'm kinda hoping someone can tell me before I tear apart these two cars. I'm looking to use the brums and discs from the 4-door and transfer them to the Swinger and use all the rebuild parts in the process.