I dont know, I just remember seeing a thread on a 5 lug swap where someone plated their UCA and LCA then drilled the holes for toyota balljoints and put the spindle in on the new ball joints.
for a 4x4, I guess you would have to check the angle of the drivershafts amd make sure they arent at an extreme angle.
realisticly, it might even be better to buy a whole late 80's toyota 4x4 lift kit, pick up a toyota front diff and suspension and bolt/weld it onto the trucks. If I didnt want to do some serious off-roading in my 4x4, I would most likely do that. I do not quite understand the point of having IFS offroad when a solid axle does just as good and can take more abuse, easier to lift. I guess since the diff stays in the same spot and only the axles move, I guess that would save on driveline angles and stuff, but then you have a whole new problem with the axles moving. I dont know, maybe I will have to look into this, maybe the mazda diff and axles would work with a toyo lift with little modification, hmmm.
dangit Limequat, you got me wanting to put a 4.3 in my 2wd and now your making me question if I want to look into a IFS lift for my 4x4, you instigator you <img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D -->
-Mike