Radiator support is different, so the condensor won't fit without mods, if at all.
Heater box is completely different, as is the mounting of the evaporator, so that won't work.
The compressor could be made to work with custom brackets, but you may as well use a more modern, efficient compressor if you're going to that much effort.
A couple of the hard lines might work.... if you're and the lines run roughly in the same spot.
So in short, no, and 30 year old GQ aircon ain't so impressive so its not worth the effort.
If you really want AC, talk to an auto AC tech they may be able to give you an idea of what pieces you could use together to get a decent AC set up.
I really have no idea. I think it would be possible. I am not a specialist in this field, and I cannot give you an answer. Search the internet, or it would be best to turn to a specialist company that will provide you with a more accurate response. I don't know if you will find a sure answer on the forums. You have to see the car in real life, all its components, to understand if it is possible to install an air conditioner or not. So call as soon as possible because winter is coming, and without a conditioner, in the car, you can't live, lol.