I have a 90' GS that came with everything except a/c. Well black leather seats and no a/c just isnt working for me. How hard would it be to add a/c to my car that didnt come with it stock?? I figure all the stuff under the hood should be a pretty easy swap. But how hard would it be to wire it all up to work poperly?? Is there a harness I would be able to take from a donor car that all I would need to do is plug in or will I need to do alot of custom wiring to make it work?? Do you guys think this would be that hard?? Anybody have experience doing this?? I figure adding a/c to my car would be easier than taking all my parts off my car and putting them on one with a/c. What do you guys think??