Here's the Old Air system in my '66. So far, with the 100* days we've been having in Texas, it's worked GREAT ! It will blow your hair back on High, and cools very well.
My dad has an Old Air system in his black '32 coupe and it cools great as well. We put an Old Air system in his '47 Hudson truck, his '53 Studebaker custom, and his '55 Chevy wagon. Needless to say, we're very happy with Old Air a/c systems.
-Aaron