i know several people who have the 5.9 also in the '98 zj. look into your trans, has it had work yet? if not, you may look forward to having some $$$ work done. other than that, its a sweet ride. also, look into a new air intake system, the one on the 5.9 is outdated, and too restricitve, the 5.9 is a great engine, but needs some mods to help it breathe easier. i have the 4.7 HO. i raced my friends 5.9, and well, he looked pretty mad in my rearview mirror.
2002 GC Overland, 4.7 HO
[COLOR=navy]fully loaded, and then some. it does everyting but wipe your @ss. [/COLOR] K&N FIPK,
Borla Cat-Back, Yakima Load Warrior custom lo profile mount, JL audio stealthbox and amp.
Old man Emu HD springs lift, OME SS,
OME shocks, 265/65/17 Bridgestone revo's