Well I've just read Stinka's thread which was stickied and have opted against the idea now
http://www.nissan4x4ownersclub.com/forum/showthread.php?t=17055&highlight=dislocation+cones
It appears that you have to do a bit of bodging to get the spings to stay in with cable ties and welding rods :doh plus you don't benefit from the full height unless you swap the shock absorbers
I think I'm just going to do what I did with the Maverick and just swap the SWB springs for a set of LWB springs which lifts the rear significantly but not to the point where you need to swap the shocks, however swapping the shock s does make the ride smoother on the rear as the springs will be somewhat more compressed than the SWB ones making them firmer
I'll then wind the torsion bar up on the front to match the height of the back and then I'll see if Santa gets my letter for a 2" body lift kit :sly