Id just get a body lift instead of a susp. lift on the nissan. I have a Calmini lift on my Xterrible, and it has caused nothing but grief and worn out parts/tires.
It did better offroad when it was stock. I wish I had just done a body lift and put on bigger tires.
well, NOW I wish I had never done ANYTHING to it, or never even bought it, but its too late now.
It DID do pretty good in Moab yrs ago..kept up w/ all the XJs I was with, and even 'outran' a few of them on the trail.