Don't know what you are asking in question 1. 2. You should leave any shims that were there from the factory. 3. Most will pack the knuckle 3/4 full. Did you not look at Romer's awesome thread write up on mud in the 80's section?
1997 FZJ80, White, Locked, deflared, 5.29'd, 4-5" lift, Fox's, DC shafts F/R, 35" AT's, Metal Tech front bumper w/ winch, custom tube rear bumper, SROR sliders, IPOR skid, Custom exhaust, Snorkel, Eezi-Awn 1600, Mark's Speedo Box.
2008 Subaru WRX Wagon, mods and lifted on 27's
2001 Honda XR400 with goodies