4WD Short Course

[Tupers]

I've had Thunder Tiger Tomahawk ST for a while but got bored of nitro so I've decided to convert it into a 4WD electric short course truck.
Basically my plan is to make a new chassis that is 40MM longer, strap a pair of 3s LiPos to the back and stick an electric motor in it. The one thing I haven't quite sussed out yet it what to do about a motor mount. I had considered running the optional centre diff and having a diff/motor mount custom made but my other and possibly better is to go with a 1/8 diff and an RC-Monster motor mount.

This is the standard lay out.


And this is what I'm looking to get out of the conversion.


What do you guys think of this?