I just did the rewire on my 90 wrangler and used the painless harness. It made a difficult job much easier and it still took me 2-3 days to get it done. Now I have a lot better knowledge of the wiring and no more gremlins. Definitely worth it to me. It eliminates all of the computer wiring so you will need a webber or mc2100 and mine came wired for a fuel pump at the fuel guage wiring which was easy to fix at the plug. It also has connections for future upgrades like a fuel pump, electrical cooling fan, and rear wipers.
2007 jk rubicon unlimited, rescue green, rugged ridge bumpers, 9000# superwinch, 3" procomp lift and 1990 yj 4.2L, weber carb, tfi ignition, nuttered, bushwacker flares, 4" suspension lift, 33" cooper stt tires , Grey soft top, tinted windows, bikini top and red body