I have a Mark III H, and a T34/76 '42 production that I wanna use in a Stalingrad Dio. I'm just starting to get into this type of research so I apologise of this is easy enough information to find.
And in regards to the Russians, is there a good source for the type of markings you'd see on T34s during the battle?
Another thing you could try to research, is the order of battle at Stalingrad, that is, find out what units were involved (and maybe even find out when they were there!), and from there, conjure up some markings for your vehicles.
Good luck on your dio! I hope you're able to post some pix either here, or on Armorama, or wherever. Regardless of where you post, I hope you let everyone here know!