Hey oka, the best thing you should do is pick up something like the Sidewinder ESC. In fact, you can get a sidewinder with brushless motor for just $100 from:
I'd go with that. The brushless motor is just better, and it's programmable with a special cable (another $25, worth it if you're into tuning the power of the motor).
And if you feel like it, this should also run brushed, too!