Battery up front, or towards back?
 

There is always the middle too. I am mounting a battery box and I'm not sure where to mount it. I can put it towards the back like novak kits, or up front like the new losi kit.

If this is a track vehicle your gonna want the best balance possible, If it's basher set up the balance will still be a factor but not as much of a concern.

If you plan on tons of wheelies, you might want it towards the front. If you plan on.... lots of breaking?put it in the back. You could put the tray w/ a battery (or something similar in weight and size) on the truck and find the best balance point.