If your recipient is an ’80s CJ like ours, you’re going to have a mild mess of wiring to clean up. The majority of it is related to the feedback carburetor system and its computer, which may have been spawned from the devil himself. The good news is that most of the later feedback stuff was added-on to the core harness and is pretty easy to remove. Aside from constant and switched power, you’ll retain the temp and oil pressure leads, tach lead (if applicable), and the reverse light leads that go to the tranny. Everything else goes away. We swapped the oil and temp sensors to the new engine and retained the original gauges. The headlights and parking light leads also stay, but that’s all in a separate loom. Overall, our stock harness was in great shape despite its age.