Here is a brief history of the experimental KV designs
http://www.battlefield.ru/index.php?...mid=48&lang=en
Here are the detaile blueprints fot the KV-220
http://www.the-blueprints.com/module...ew.php?nr=6572
and here is the KV-5
http://www.the-blueprints.com/module...ew.php?nr=6565
If I have understood correctly both the KV-220/KV-3 and the KV-5 were supposed to be mass produced, the first in large quantities as standard heavy tank, the second in limited numbers to be used in support of fixed defenses. Given that its weight was supposed to be around the 150 tons that was pretty much the only practical use (that and looking good during parades, I guess).