I think that if you contact Vintage Air, that you will find out that they do not make any retrofit air-conditioning kits for any car newer than 1966. You would have to purchase parts from them individually.
1959 black 270hp (9/2/69) 1981 Beige L81(10/20/80)
Looks to be a major project to me. You could get everything related to an A/C installation off of a wreck and do a full factory conversion. Take lots of pics while you remove pieces and mark everything. ( If I were to do that I would want both cars in my shop side by side until the job was done.) Or maybe trading for an A/C car would be the best way out.