It's pretty simple. Diy for sure. Most difficult part is removing the rear shock upper mount. 23mm(?) ratchet box wrench is the trick. The lift in the front is just how much you adjust the location of the mount the T-bar slides into. If you are not adding extra bumpers and such. Just jack the front up and tighten the big bolts hanging out the bottom. The rear do the 1.5" for now. Remove old shocks. Lower axle until springs are lose, remove, install new spring. Install new rear shocks. Easy. Get an alignment after you adjust the front to your liking. The lift height does not affect your ability to use larger tires Get AT something not Mud tires. Save your money for sliders and a ARB front locker.
98 uzj100. Factory rear-ARB front locked 4.88's. ARB Bull, Warn 9000, Irbis rear bumper, Slee sliders and belly pan. OME t-bars w/863 rears, HID, XM