CRT .5 brushless conversion project

Evening all!

I've just ordered myself a crt .5 pro kit as a "christmas bonus" present to myself, and I am keen to convert it to run on electrickery, instead of the pesky infernal combustion glow motors. Looking at the specs, the kit seems pretty comprehensive, but obviously it is going to need a few modifications to work well.

I am wondering about buying one of the RC-monster conversion "kits" that include the chassis, motor mount and a few other bits and bobs, as this would make the conversion nice and easy. Can anyone tell me if the standard shell would fit on this extended chassis? Or is an aftermarket shell needed?

My other main choice, is that of motive power. I have had heard good reports on the Mamba Max esc, so one of them is going on the shopping list, but as for the motor, I am still trying to work out which is going to be best. I am planning to use 3s lipo battery packs (I already have a number of these that I use in some of my RC planes). Buying one of the Mamba max sets would probably be easiest for me, but which kv motor to go for? I'm not after an out and out speed machine, just something for bashing in the work carpark/grounds :)

The other thing I was wondering about, is that of pinions/spur gears for the centre diff. Is it usual to use the supplied spur gear, or use an aftermarket one? I presume that the RC monster conversion kit has an adjustable motor mount to allow the use of different pinions?

Sorry about the barrage of questions, I'm off to read up on the CRT .5 conversion threads now, to get some more ideas!

Cheers
Andy