I had a 4" spring under on mine for a couple years. Ran 33" then added a 2" body lift and cut the fenders for TJ flares and ran 36" TSL's. Had the skidplate spacers and didn't "need" the slip yoke eliminator for it. The lift I ram was Explorer Pro Comp. It held up great.
Pic's of it when it was white are with it spring under. Orange and 36" TSL's are spring under. Orange with Goodyear Wrangler RTII's it is spring over with 1 ton axles.
For shots of how it worked go here:
Look at 2004, 2005 and some of 2006. The Jeep even got into JP with a 4" spring under lift, 2" body lift and 36" TSL's. Sometimes I wish I had left it in that configuration. Simple and effective. If you have questions just ask.