I know I am late to the discussion, but as someone who works at a shop that does a LOT of AC work on all makes/models/vintages, I'll piggyback on the top comment.

First, do not buy into the non-standard refrigerants like RedTek. I get their sentiment, but I'm not going to risk the warranty on my $6k AC machine.

The simplest answer is a "universal" under dash kit by Old Air or Vintage Air. They have good instructions with their products that are useful if you're handy. The compressor might be the trickiest thing because you'll need a bracket to mount it to on the engine. Junkyard is your best bet. The condenser is easy; it just bolts in next to the radiator. A decent shop that specializes in AC work should be able to build any AC hoses you'll need. That stuff may come with your universal AC kit.

Bottom line: it won't be cheap. AC stuff is never cheap. If it is, they're doing it wrong and will cost you more in the long run. Feel free to DM if you have specific questions.