The last couple of wiring harness messes I did, I wound up taking (one time) the original harness (the other time) a junkyard harness in better shape than the original from same kind of truck, apart at the kitchen table and with a bunch of barrel crimps, solder, heat shrink, and a couple of spools of wire, I rebuilt them and retaped them up..... original connectors work the best when you have to plug into other original plug ins... I deleted the fusible links and grafted in a newer underhood fuse box from "something else" in the junkyard in their place.
I spent about a weekend on each and so far so good/ dont have $250 in both. Im gonna be doing the same to another D250 harness sometime this spring..... add that one to the other 2 I've done and still wont have $250 in all of them. but the prices Im finding on other things for them especially for nice original (but used) interior bits and pieces is more than making up for what Ive saved by D I Y'ing my harnesses..... you guys see what good interior windshield trim, door panels and Ramcharger consoles and seat pedestals are going for when they can be found???? I gotta save where I can to make up for that sort of headache
so far I did my sons 89 ramcharger harness (we deleted the TBI and went back carbureted) my 85 D150 and the next will be my 83 D250.