Maybe the rc-monster revo motor mount adaptor might work ( bolts in place of a nitro engine like the SP kit does, but allows more room for the motor ). Otherwise, maybe an impaktrc motor mount.
http://www.rc-monster.com/proddetail...d=RCMrevomount
http://www.impaktrc.com/product_info...oducts_id=4258
not sure where the mounting holes are on that chassis though, seems like they are quite far back, making the rc-monster mount a safer bet..