4peanut, is that all of the mods that you have done to your LC, just tires, spring spacer, cranked torsion bars and drop diff.? i think i am going to do the exact same thing to mine. Once again no handling issues after you cranked the torsion bars? Also I assume you had an alignment done?
I also removed the "V8" emblem from the tailgate. Does that count?
A small adjustment (e.g. one full turn of the adjusting bolt which equals about a .25" ride height change) shouldn't throw your alignment out of whack. Anything more than that and you will definitely want to have your alignment done, for safety and to avoid premature tire wear.
As far as handling, if you go too high and don't have enough droop (minimum equals 60mm = 2.362 inches = approximately 2-23/64 inches which is pretty darn close to 2-3/8 inches), your shocks will top out and lift a wheel or wheels. I am at 21" from hub center to fender lip and things feel much better than at 21.75". Others have found 20.5" to be the right height for them (spressoman). YMMV.