Gearing for losi 8t 2.0 truggy

Just pick up a 8t 2.0 on ebay going to make it brushless.My question is
can i use the plastic 46 tooth spur gear that mike sells.What gearing
should i use.I have right now a 10, 12 , 14,15,16 tooth pinion.I will be
running a mmm esc,i have a medusa 36-60-2000 right now will that work,
thinking about a neu motor. And what battery should i used? I have run
buggys for a while,so i am trying a truggy this time.What is a good racing
set up for this truck.Thanks!