Fire Control Directors

In analyzing American cruiser designs from the 1930's, I find that to correctly model them, I need to allow for Fire Control Directors, their weight and their position, so that they affect stability correctly. For the Radar era, that needs to be included, as well. My approach would be to have a Fire Control Director database and a Radar database. A ship specification would have room to list directors, by type and height to their base from the keel. The stability calculations would need to factor them in, when appropriate.