hey guys im getting a sc10 ft from the wife for christmas.

now i have never raced 2wd sc before so im looking for a little help. i have 2 options on electronics to put in this truck. i want to run mod 2wd so i was looking to put in an lrp ssx v2 tc with a reedy sonic 7.5t, or a tekin rs with a redline 10.5. im not sure on how the truck will handle the 7.5 or what gearing would be a good starting point. I also wanted to know if you guys are running ball diffs or gear diffs? thanks again for any help you can offer.
Dan