Engine sputtering at about 65

Might be easier just finding a new harness than fixing that one. The alt gauge is always off don't worry about it, there is a IVR behind the dash that goes out and affects the fuel and temp gauges, that's why I asked can be that simple.

Oh yea, I'm guessing that the whole harness would be a swap. I've not had a chance to pull the dash out yet (another thing on the list of things to do unfortunately). I'm a bit afraid of what I might find back there lol. I'm sure it's awful. I had to replace the steering column and they had bastardized the horn wiring as well as some other things. I'm replacing the steering wheel also (far lower priority of course) and when I do I'll have to redo all that wiring in the column that's been screwed up.