That's a good start. We still need to know which axles by Moser. Specifically, what is the "standoff" or "brake gap?" They were different on A-Bodies. Moser sells 5 x 4.5" axles in both the A-Body and B-Body brake gap. Also needed is the size of the center register. With this information, we can probably figure out what you need. Don't worry about the bolt pattern of the drums. As long as they fit the backing plate / brake gap / register, the bolt pattern can be redrilled.