Check these out:
http://www.rcgroups.com/forums/showt...threadid=84771
scroll down till you see RC Car Conversions
http://members.aol.com/rchelicam/microszr/microszr.htm
The BEST place yet for bit tech info.
http://www.rcgroups.com/forums/showt...ight=MOTH+plan
contains plans for a bit plane, the only thing you need besides the car is a lithium polymer cell. Read the whole forum, it has lots of good FAQs.
These sites are the BEST for bit plane info, check em all out