The reason I suggested the name change is, as artemis mentioned, Juggernaut does not translate into Russian. We've all heard of the badass German tanks: The tigers, panthers, and pumas - well the ISU 152 is the badass that hunts badasses - the 'Animal Hunter' or Zveroboy.
Wouldn't be balanced It'd be awesome if could use it as an Priest105/JP/AVRE combo. (with a munition cost and a slowass reload time and AP/HE combined)... Heck, the AP/HE buttons *ARE* already in-game. Look at the tiger campaign. Also, the Afrika Korps mod uses 'em successfully I'd say about the range of the Flak88. With about double the punch. But 3x the reload time, or something.