Welcome to the Cherokee. I love my '99. Definitely go for one with the 4.0L in it. Manual transmissions are out there, but they are hard to find, at least around Connecticut and Mass, it was about 150 to 1 when I was looking on auto trader a couple years back when I bought mine. Definitely hold out for one with the Chrysler 8.25" rear end, it can also be identified by 3" axle tubes, the Dana 35 has 2.7" tubes. The Chrysler isn't a bad axle if you don't abuse it, I have heard of guys running 35's with no issue, but personally I would stay around a 31" tire if you must lift it and you will do fine. On the front end, if you get one '97 to 99' it will have a reverse cut Dana 30, which will be mildly stronger than a standard cut Dana 30 in the '00 and '01. It will also give you a better drive shaft angle, due to the high pinion, if you do lift it. If you do lift it you will want to consider a Slip Yoke Eliminator if you go over 3" of lift, so I have read. Personally with the price of gas right now, I wouldn't lift it until you have driven it around a few months. I love the way mine drives and its all stock, there have been a few times I would have liked a more aggressive tire, but so far its done me well. I heard something about the head changing in 99 too, but I never really figured out when it changed, but the new design is a little more restrictive in an attempt to increase combustion and decrease emissions. And I believe the Æ00 and Æ01 switched to ignition coil packs, instead of one coil and a distributor. Personally I would look for one with the NP 231J transfercase over the NP242, but then I donÆt like all wheel drive, I prefer a standard transmission and transfercase. The gears will really be your limiting factor for tire size and lift if you so choose, the manual trans, 6 cyl came with 3.07:1 gears, and the auto came with 3.54:1. Expect to do the front wheel bearings around 100K miles, and the cooling systems have a tendency to build up rust if they arenÆt properly maintained. There are tons of parts out there for most any mod you want to make. I too would stay away from all the hype power adder parts, they just donÆt help in the useable power band, I vary rarely take it over 3000 RPM. Anyway thatÆs all I can think of off the top of my head, do a google search, there are a ton of sites out there.
Sean