All right finally got around to it. I got some radio shack 700mah AAA's, and built a 6 pack(the cells were a major rip but for convenience...... Once I got it all set-up the diff went a little weird again but I threw a bit of thick grease on it and it's back to normal. Now the left bias popped back up again. I now have, when looking from the front two shims on the front right(one thick and one thin) and one on each of the two back left motor pod mounts(both motor shims from an old p2k). I also reemed out the top deck as ModemJunki suggested(thanks for posting that, it really helps). The car is really sweet now, no annoying reverse immediately(I've got my esc set to 3 sec rev delay)and no left bias. The body fits fine as well which was very lucky. Not blazing speed but the motor is stock, it's perfect speed for my deck though.
Cheers.
