96 was the first year of OBDII, and a lot of stuff was changed in 97, so basically, 96 is kind of a standalone year when it comes to the ECU/sensors/wiring.
There's really nothing to look for on an XJ that you wouldn't look for on an MJ. They're essentially the same vehicle. Biggest points are the rust spots under the fender flares and floors.
There's one up at that dealership that IIRC is a 99, two door, 5 speed, 4wd with a lift already on it.
Yeah I'll be around next week. Really don't have anything going on at all until the 23rd, although we will be in Laurie Tuesday morning.