Blackie, you can do whatever you want. It's a game afterall. The above is only historical discussion. After all, mechanical problems have never kept gamers from using divisions of Panthers at Kursk
The JS III is a perfect tank to use as a "threat" in a politically based game or simulation. The very thought of a "superheavy tank" sends your average "risk type" game player running for the nearest politically correct shelter... There really isn't a counter from the western players except Nukes.
Good idea! And yes, they would be available for the 1946+ period. Remember, "sometimes the biggest lies are the easiest to pull off".
Will
"He who fights with monsters should look to it that he himself does not become a monster." - Friedrich Wilhelm Nietzsche, 1844-1900