brushless in a wraith. i don't really recommend going brushless in crawlers but like anything it can be done. a sensored system is a must and try to stay over a 3000kv motor around 10.5 to 13.5 motor turn. a mamba max pro ESC will handle 2s-6s lipo's. the thing is now that you want brushless you need to upgrade some parts like drive shafts first or you might only get a short run time from breakage. with greater speed comes greater repair bills. if your stock things like plastic knuckles may give way to a big jump as these are made for going slower. there is a few more things that you should do like gearing and if you change tire size then you will need to change gearing again to keep motor temps down so it don't burn out.
sorry i didn't post in earlier new job with crazy hours just getting adjusted to it. i'll look around for more info later on and see if there is some more options with motor and ESC combos that work with what you are going to do.