I have a 73 and thinking about putting in a vintage ac kit rather than rebuilding the stock 37 year old AC system. Any thoughts? Thanks

Vintage air is the ticket versus replacing any of the entire stock a/c system, better controls, blowers etc. I have helped a friend install two different systems from vintage air, when something goes in my stock system I'm going vintage air.I have a 73 and thinking about putting in a vintage ac kit rather than rebuilding the stock 37 year old AC system. Any thoughts? Thanks