im not sure what you're really trying to accomplish in this, i assume lighter weight? ive had a 91 harness apart, trust me with the way the wire are spiced together it would probably be harder to pull apart than what its worth. The other thing you can look into is getting a harness out of a 4-cyl with no options, then just run the other 2 wires for the injectors. as long as it's between 91-95 IIRC it will work. you may have to extend some wires but i think that's it. I did something similiar when we swapped a 2.5 for a 4.0 in a friends wrangler, just swapped the computer and ran the extra wires.
Dingo