Get a larger receiver box also ...maybe one from a Traxxas Slash. The receiver is pretty big.
In my opinion, that AVC is not needed much in a 4x4 1/8th scale like a Kraton. Unless you are on ice or a slippery floor. I have it in one of my RC's, but find myself never using it. I can drive fine without that turned on. I used it for a little while and found it better just turned off.
Out on some ice, it will work awesome and it's pretty neat . For normal good weather running in a Kraton, I rather not use it because I rather drive without and do not need that at all. If you want to use it just for normal good weather bashing in a Kraton....I wouldn't bother. However.....it is pretty cool to mess with in very low traction situations. .
I don't find myself on low traction surfaces much at all. I just wanted to try and give you some idea of what to expect from that AVC.
I myself have it disabled and it stays that way. It was fun to mess with for a good 1/2 hour but I almost never want to use it now.
TIP : You have to set all your trims and sub trims to zero and get the vehicle driving straight with just the servo arm and the turnbuckles. If you use any trims, or sub trims....the servo will drift. It's just like a heading hold gyro on a RC Helicopter. Some people will disagree, but I've been flying heli's for 20 years. The AVC is just like a heading hold gyro in a heli and the AVC acted just like one when messing with it.
TIP: The faster the servo...the better also.