There is a lot of info on the website on working on a Factory AC unit, but I haven't seen much on the dealer installed units. Have you considered going with an aftermarket system such as Vintage Air?
https://www.vintageair.com/ they have a nice looking system, that I would like to install when I get to that point on my build. Not a real priority here in Colorado. There are some excellent youtubes on installing the vintage air in an F100, the first one is part of a 4 or 5 part video from Autorestomod, and the other is 1 of 4 from Vintage Air, showing the install. You can see how they look towards the end of the videos. I think they look much nicer than an original, and you would have all new parts, and not have to worry about what refridgerant you would have to use.
https://youtube.com/watch?v=OKaPAXSP2oU
https://youtube.com/watch?v=rgW3kysOKSU
Regards
![Thumbs up :thup:](./images/smilies/icon_thumright.gif)