Brushless newb need a lot of help!

[suicideneil]

To convert the Emaxx to brushless only requires a few essential parts:-
steel idler gears
3.3 slider shafts or steel cvds
brushless system- for bashing an 8xl and mambamax on 12/14 cells would be ideal
Lipos arent good for bashing, too fragile- stick to good quality sub-c cells

After that its a case of upgrade if/when it breaks.

To convert the revo isnt too much more difficult- do a search for e-revo/ bl revo and you will find plenty of pics & info to show what is involved.
And welcome to the forum.