Just get a couple wiring harnesses for the donor vehicle, and one for your Jeep. Mainly what would need to be spliced would be key-on power for the ECM, the starting circuit, the gauges, Maybe a speedometer sensor if you use the cruise (and other cruise related wiring). That's all I can think of off the top of my head - never done that exact swap. Just compare the 2 wiring diagrams and see what is needed and what isn't.
1978 CJ5 5.0HO/T177/D300, '86 D30/D44 WT axles, 'glass body, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy
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