tkhoo-i wasnt trying to ignore you when i was selling my crt's,but i would say that the 60amp version would work very well.you would have to get a different fan,as the one that comes with it is only rated for 2 cell lipo use.the instructions will say the same thing. that 80amp one is bigger than the whole center diff assembly.on 3 cell,that combo would be insane,and rather hard to drive.should be fast on 2 cell still.
if i knew how to post links,i got a picture of the 80amp 1/8 one next to a sidewinder for size reference.