Well, have you started it and run it before winter? If it starts, then shuts off, it could be the fuel pump for sure, especially if it's never been replaced in it's lifetime (23 years is a long time for a mechanical pump to work).
It won't be hard to find a JY one if you take that route, but can't guarantee it to work... Anyways, if you think they will work, every cherokee before 86.5 will have the correct pump, as well as the YJ's... but you're less likely to find wrangler's in the JY...
OR, you can find a 90+ MPI with electrical pump, manifold, TB, wiring harness, well... pretty much everything... and do that swap, but that may be pretty hard... (it's my plan though!)
