im about to do the front to back lift, now i know ill pull the fronts out an put them in rear throw a 2 inch spacer an will net 3-3.5 inch.  now for the front can i grab zj v8 front springs an throw the spacer under them one kid was saying he got 2.75 inch lift from it.  i dont want to have to start changing trac bars an everything else.  im just getting it to a nice stance till im done with my maxima for my daily driver an then im going to jack the jeep up but the maxima is 8 months out to being done an i love mud. 

idk if you found out the answer, but i tried the front to rear swap, and when i put my front coils in the rear, i couldnt even get the control arms to bolt up.  the tops of the lower control arms hit the axle bracket.  i have 95 V8 upcountry coils, so maybe they were the limit in which the suspension could go.... i took a measurement and it was waaay over 4 inches of lift from the front coils being in the rear.