From One A-body to Another (Air Conditioning)!

Has anyone ever attempted to move an air conditioning unit from one A-body to another? The reason I ask is that I have a complete air conditioning system in my 1975 Dodge Dart (Parts Car), and I need to remove it and place it into my 1974 Plymouth Scamp. The only problem is the different years and engine size. Will This idea work?
Pic 1-2 is my Dart 318,
Pic 3 is a Slant 6 with Air Conditioning I found on Internet,
Pic 4 is my Slant 6.
If this will work, what Belt size do I need to find that will work for my Slant 6 with the new Air Conditioning System?