the yokomo 180 will fit fine, just use some offset wheels and/or the wide wheel hubs that come with the kit.

as for a motor, the komodo dragon 19t and checkpoint money 19t are both really good. If you really want to step up go brushless and get something in the 6.5(way too much power, but can you have too much power) - 13.5 (a little light on power, but still very good) range.