I wish somebody would have told me this before I started chopping my rig up.
You make a good point on looking to the future. It would be wise to go ahead and upgrade to 35 spline if I'm buying axles anyway. I think though even at 31 spline the 9 inch will probably be stonger than the FJ front. I may put an upgraded set of birfs up front, but I don't see going much further than that. For me, if it's time for chromo Longfields it's probably time for 60s.