they can handle a fair bit of power, its the torque that kills them, because your putting whats ment to be for a 2000cc engine onto the back of a 3000cc engine
it wont last very long especially if you have a HD clutch, that bitch will die fast as f**k if you like to put your foot down alot and if you take off in the wrong gear you gonna snap all that shit up in there lol
your best bet is to spend that extra cash, get yourself an RB25DET box and tailshaft, get the tailshafts glued together by a workshop, and V-WALLA!! a box that will handle the
shit you put it through