They will interchange. I took 1 from my 94 f150 and put it in my 92 f250. Only difference is the indicator lights. They can be changed from one to the other. 94 have air bags and 92 don't so the indicator lights are rearanged.
I have done this several times. Cut it at both ends, install new wire, tape to side of the harness and its done. My customers wouldn't pay several hundred in labor for a single wire, and it isn't worth the time.
The psom is on the back of the speedometer. The cluster needs to be taken apart to access it. There is a lot of discussion about them. There are also utube videos about fixing them if you are up for soldering small parts.
Mine has tools parts and construction supplies everywhere and it's too cold to sort it all out. And now it has more dirt because I replaced a broken water pipe under a mobile home. Can't wait until spring.
If the alternator is bolted to the engine it is grounded, unless the bracket is corroded. There is a regulator and brush assembly screwed to the back of the alternator that can be replaced. That can bring it back to good as new. Only thing to watch for, there are slip rings inside that the...
Once it is warmed up you can let it run to keep warm. I have no problem doing it when I have to work in the cold. Just remember if the engine is cold idling will not warm it up. In freezing temps you can run 5w40 oil. It will start easier and will not hurt anything.
Pay attention what you see in a junk yard, you'll be amazed by what you can find. My truck was almost one of them. School district didn't know what was wrong, thought engine was blown so they sold it for scrap. I got it before it went. It ultimately needed glow plugs and a lift pump to run. Lots...
It's not electronic. It's a simple system. Controller has 2 plugs 1 vacuum connector and one cable for the temp door. My truck is also a 92 so it should be the same except possibly the belt system. The hoses I used fit a 5.0/5.8 but they fit with minor bending at the compresser.