The Novak Super Sport is the most widely used brushless motor/esc combo and works very well. It performs similiar to a high-end 11 turn motor except for one thing: NO MAINTENANCE! Brushless motors also tolerate heat much better and can run for extended periods of time without damage.
The Novak SS will fit anywhere a standard 540 motor would. It'll bolt right in without any modifications.
Here's a link:
http://www2.towerhobbies.com/cgi-bin...?&I=LXDDD7&P=7
It costs $235, but it will save you money in the long run - and saves you hassling about cutting comms, replacing brushes and springs, etc. Call your local race track to see if they allow brushless motors in the mod class. Many tracks do, or some have a separate brushless class. Even if you plan on just bashing right now, sometime in the future you'll probably want to try out some racing.
I know it's hard to spend this kind of money. Just for bashing around, a mild-mod or stock motor would probably just be cheaper to go with. With proper maintenance, you'll still have plenty of fun with the motor your car came with. You can always have your LHS cut your comm every once in a while instead of buying an expensive lathe. If in can afford brushless, however, I say go for it!
