considering the same 6 six speed runs behind 200sx and is2000 and a few other racy cars, it will definately handle a standard 2JGTE. i know personally of one of these boxes that runs reliably with over 200rwkw. in any case, aside from being a bitch i have no point.
frank is right it wont bolt up, but it is compatible with my garage, so in exchange for a few hundred dollars i can put it to good use.