I have an 88 4runner v-6 that i am thinking about going dual cases in.  I kinda want to avoid buying the v6 to gear driven tcase adapter but it might be easier just to use one.  Im pretty sure your r151fs are the same tranny just a little beefed and has a different output shaft (so i dont need the vr adapter)??  If so I might be interested in one.  Do the tcases use a top shift or forward shift off of the back of the tranny??  Any info helps.
Thanks