AC lines and components

The engine matters. The transmission appears like for a small-block V-8, but no expert. Presumably, it was a factory AC car. If not, the firewall differs so a factory setup is not an option. Only use the RV-2 compressor beast if you want to stay original, otherwise a small Sanden compressor would be much smaller, lighter and less costly. Bouichillon and others sell brackets. Pulleys and belts add much fun complication. I think you can re-rubber your existing AC hoses. I have done that on other cars. I cut the ferrules off with a hacksaw and grinder (M-B used very thick ferrules). I have the Mastercool crimper, but you could also use Oeticker stepless ear clamps or even screw hose clamps. Only use "barrier" type hose.