That definitely goes along with the blocko style, but i think it's a bit too bulky. Make the gun barrel a bit longer and thinner, it looks too much like a howitzer. Also, an MG on the top like the T90's would be awesome. To do this might require remaking the model, but making the whole thing longer (maybe even as long as the one in the picture, with 7 of the small wheels would be ideal) would be great.
I really hope someone scripts this, as it would be fantastic for my TDM I'm making right now. I can pull a sound from world of tanks or something like that if needed.