I know about the insulation problem, where it basically crumbles off of the copper wire. I know that to my IAT sensor the insulation was shot. Looking up prices I see that I'm looking at approx $550. Is the known problem basically the wires and maybe a plug or two, which are sold seperately? I'm asking because I'm more than capable of pulling the harness on this straight 6cyl. and soldering in new wire &, shrink tubing all the connection. I've seen the illustrations of this harness and it's unjustified at that price, as well as not very big.
As for the throttle body harness, is that a seperate harness? or a couple wires?

I could buy several spools of wire, shrink tube, more solder, even a new iron, tape & wire loom. Relax at my work table while having a few beers doing this. When done have an extra $400. in my pocket, figuring an even $75 materials, $75 beer.