It's always good to have spare harness's.  I got one, and I had to use it on my rig when I installed my motor.  Matter of fact I made the harness even better.  The 22RTE had the wires to the coil coming from the EFI harness, and not the body harness on the drivers side like in the 22R/RE's.  But it ran across the hot turbo, and the wires were fried.  So, I spliced in the factory wires from my spare harness, and routed it up along the firewall, around the booster, to the coil.  And I used the matching set of wires, so the color coding was correct.  That and alot of the plastic clips and plugs are brittle from 20+ years of heat from the engine.  So, they tend to break.