If you are still intrested. You should look at the SW2 chassis from Bender. It uses slider shafts from a Emaxx, a stampede transmission, and TLT axles. You end up with a really nice 1:10 scale truck that is really capible of crawling and looking nice. Go to
www.thecrawlerstore.com to check it out.
As for a controller I have a stock Traxxas TQ3 from a Emaxx. I changed the wiring inside the controller so that the red toggle switch works as a on/off switch and sent the power to two pots I mounted at the top of the controller. One is used for end point so the servo doesn't get to much power. The other is used as a independent rear "steering wheel". It is by far the best "bang-for-buck" crawler controller.
~john