hi
read turkey's reply + these infos might help you
off-the-shelf bolt on bits
well you can go to your local ARB dealer and grab a catalogue and there are all the bolt on bit you can get off the shelf here. ARB seems to be the only comp that has "goodies" for the WJ's
off the top of my head, you can get
- suspension package
- ABR bull bar w/ winch ~1000 for bar, ~2000+ for winch
- side steps (kingsley i think)
- Front lockers ~1500
- dual batteries ~depends on battery type
-long range tank (long ranger) ~1000
i can tell you what you cant get off-the-shelf here is
- rear bar with tire carries
- snorkel
opposite lock used to have a swing away rear tire carrier, last time i checked they are ~900
now there are other bolt on things that you can import from US or other places.
www.trailready.com - from some over the top rear bars with carriers, & boat look alike front bars.
i got my rock rails from "off road general store"
http://www.offroadgs.com/
they are pretty good.
like all things they will cost a bit due to the heavy shipping cost. + tax + stamp duty etc. (thats is if you get it through some local store)
or you can have some dude custom make rear bar, swaing away carrier, & snorkel.
exhaust system
it has a 2.5" medrel bent all the way through, i personally think its pretty good system. if anything i'd look into the cat-back.. unless you're looking for some serious power upgrade. give it a K&N filter or the like and take it from there.
more power
http://www.kenne-bell.com/ good luck..
gearing
1, yes the D30 front end will have higher ratios availible, but im a bit weary about the rear44a.
2, the front end might not be as easy as changing R&P you might have to change the carrier as well.
3, maybe have a look at slightly larger tires? if i remember right, 2000WJ comes with 16" rims, & 245/70/R16 tires?
maybe ahve a crack at 245/75R16? that might lower the rev at 110.
other interesing info you might like to know (you too turkey)
1, 99-2000 WJ has a dodgey thermal fan, in some cases, adding the bull bar results in higher engine temperature. they chucked a big stink over this issue in the US, they ARB USA do not recommand the bull bar are not recommand to install on those 2 year models. BUT im not sure where we stand on this issue in Aust. (99 definietly, but i have to triple check with 2000 models.)
2, WJ rear Diff (D44a) is the same as the ones in Dodge Viper.
BTW i know nothing about WJ.......