Check out this write up my talented buddy Josh Burns did on the LC Icon Upgrade a couple months ago
http://www.off-road.com/trucks-4x4/tech/icon-vehicle-dynamics-land-cruiser-100-series-stage-3-shock-install-54563.html
http://www.off-road.com/trucks-4x4/tech/icon-vehicle-dynamics-land-cruiser-100-series-stage-3-shock-install-54563.html