Worth it? More than likely, since the stock diffs are plasticy crap- a big BL motor will soon chew them up. You will need the yolk adaptor do-das to use center drive shafts:
http://www.rc-monster.com/proddetail...mrevov2coupler
Or the hotbodies 8mm bore drive cups for use with center CVDS.
One thing though- you wont need truggy ratio diffs unless you are planning on using massive diameter tyres or a center diff drive unit (no tranny), otherwise you will have to gear up alot to get your desired speed with that fairly normal motor kv/voltage setup...