The Bell Housing bolt pattern for the moter plate is the same that the RC4WD R4 Single Speed uses, so the RC4WD R4 Mount Kit bolts right on.
There is some sanding needed if you want to use the RC4WD motor plate or you can use the included one. If you don't want any hassle, use the included ones and drill out the 2.5mm holes that the RC4WD Frame Mounts are placed over since the RC4WD one doesn't have threads. It will secure itself to the frame mounts.
All that's left is to make a Transmission Crossmember/Skidplate. Which should be simple enough.
In my opionion much better design than the RC4WD Single Speed. 2 Speed is always nice and the bell housing comes in 2 pieces. Which makes spacing the motor a lot easier.