what needs to be re-wired?
under the hood, under the dash or both.
Assuming your wiring is pretty hacked and aged poorly, I would look to replace everything with a pre-wired harness from painless or another manufacturer, or see if I can source a factory original harness that is pretty much un-molested.
if you only need under hood or under dash, I would just look for a good condition unsed harness and make any needed repairs and go with that.
I recently re-wired a CJ (installed a efi 4.0 so it was a little more involved) but I sourced a complete harness, under dash and engine bay, used the new to me harness and re-wired under the hood mating it to the 4.0 harness and ecm.