Looks like the redcat 1/8 "buggy" chassis/brushless setup.. Here's a thread from "Andys60" who converted his Monsoon to brushless, using those very parts (motor mount, motor, esc, batteryand battery straps) from the Redcat buggy.. Brushless Monsoon
I've been thinkin about converting mine, but still not quite ready to give up on Nitro.. There just so loud they attract alot of attention and I have to bash out back on the golf course.. So it'd be alot easier to be inconspicuous, if it was electric.. But anyway, there are alot of conversion kits on the market that I think will work on the Monsoon.. From reading the Monsoon supportthread, and talking to a guy who had one, he said the Monsoon chassis is a carbon copy of the Kyosho ST-R, (Said the holes lined up for just about all the parts) so a converion kit for one of those should fit the Monsoon.. RC-Monster has a nice one for the Kyosho
.. But really, I think most any of those motor mount kits could work with a little dremel work.. Plus you can get basic battery boxes to hold the lipo's.. Anyway, if ya decide to convert one, please take pix and post up your results!! Were always interested in Converted/Modded projects!! Good luck!!