I have a '98 3RZ running in my '89 4Runner over by Great Falls, MT. I can't really afford any vehicle down time right now but I have considered the 4.3 swap because we sometimes pull trailers with it. I'm not really into the 700R4 but I would consider a swaperoo later on in the year if we could work out the logistics and you still have it.
I currently have an over fueling problem with the 3RZ right now, we suspect I have the wrong ECU. I really want to work that out but the 4.3 might serve our use better anyway. Keep me posted...