yes you can use the two speed got all I needed from finedesign rc,I went with the 2200kv mamba the mounts I used let me bolt the motor right in the excat same place the nitro went and bought an adapter for using the same two gears that mounted on the clucth bell housing,I have been using a 4s 14v pack and using an older hand held gps strapped to it top speed with stock gearing put down a sold 48 mph just get the biggest mha pack and at least 40c burst rate. just make sure all your bearings are good in your one way on the two speed setup the brushless puts out an imporessive amouunt of tourqe cant wait to step up voltage on mine good luck check mout finedesign's website I talked with a guy named mike very helpfull