well i am curretly doing a SAS on my 2002 fx4. its a pain in the ass but i already had everything set up to where i just cut, weld n go. im working on the steering right now and i just finished day 2. it is on its wheels with coilovers and y-links in place.
if i had to do it again... hell ya! i take pride in my work and ive built almost everything for the swap. i have no one around me that has ever done an SAS and so far, my build looks good. as you will learn, the 2000 and up SAS takes more skill than the others.
ill post up some pics on tuesday.
btw, im using a dana 44 out of a Jeep Rubicon, with the warn maual hub conversion, detroit locker, chromoly shafts and 4.88 gears. i built the y-links, trac bar, tie rod and drag link. i machined inserts for the teraflex high steer knuckle for heims. i also machined the trac bar mount on the axle along with some of the hardware for the coilovers. i did alot of this myself to save me a couple Gs.
sasdranger has gave me some pointers on the steering.