I also enjoy my IFS lift. Everyone I wheel with has SA or SAS'd rigs with 35's-37's, and I have little trouble keeping up with them. I can't hit every obstacle on the trail as they, but i can get through every trail. On the plus side I can run the logging roads to and from the trails much faster and much more comfortable then they can.

I too have wheeled my IFS on Fordyce(both stock and lifted) and Rubicon with little trouble from the IFS in the past. Unfortunately since these trails have gotten so torn up and crowded over the past 5 yrs, thast running IFS is getting to be less fun.

I don't ever plan to SAS my '90, it isn't worth it, I can buy and build an SA rig for about the same amount of money I would spend doing the SAS(since the only real option I would consider is running Landcruiser FJ80 front and rear axles).