My '99 XJ with 4.0 and automatic has about 230K miles and runs great. It's mostly stock aside from a few mild upgrades like H4 headlights w/relay harness, LED dash lights, and rear disc brakes. It came with the basic "idiot light" instrument cluster but upgrading to full instruments with a used cluster was a simple bolt-in, plug&play operation. (The only "gotcha" is that the odometer reading stays with the instrument cluster.)