Don't know if any of you knew him, but there was once a guy called HiAmplidude; and back in the day he was the pioneer of the brushless maxx. He used all sorts of hacker motors, but finally ended up with a c50 8XL.
Theres some info on his truck here,
http://rcnuts.hiamplidude.com/dual_b-maxx.htm
It really is worth a look round his site,
www.rcnuts.com . Although some of the stuff is old now, this guy really knew what he was doing - and sneeck theres lots of info on hacker motors on there.