[RC-Monster Mike]

This will be a bit heavy, but will get the job done. This will be the equivilent of hauling around 21 nicad/nimh cells, though, which will have a big impact on your handling. You may be better off with 12000mah packs and a pit stop. This brings the weight down to about a 16 nicad/nimh cell equivilent, which you could almost make up with a g-maxx chassis and a few select parts, and would still give you 72 amp continuos capability and 120 amp surge ability, which should be safe. It would be a good idea to have a nice heatsink and fan on the motor to keep it cool for the long runtimes, too.