Thanks. I thought of the socket idea (it's 8mm) and of course I find out I needed a DEEP socket when I got home - DAMN! I will take this set back to the store and get the correct one. To lock the flywheel in place, I followed the advice of one of the threads here and jammed a toothbrush in the hole where the carburetor was.

Thanks for all the help guys. I plan on finishing up the project tonight. I'll be sure to post pictures when it's done.

Another question: is a "failsafe" device like the one I have linked below an adequate replacement for a BEC. It seems to me that they are both one in the same. I understand the BEC provides power to certain components (servo, ESC?) but couldn't those just get powered from the car battery? My main concern is that the truck stops when the juice runs out.