adding air conditioning kit

ok so its a 63datsun. is there any kits ot there to add air to these. its my daily for now but i got to get some air. and i dont want to get rid of this because of no air. so if some one knows about how much this would cost to be done parts, labor, me walking out with air let me know. about what price range im i looking at to have air added to this thing. thanks

check out this kit...

http://www.nostalgicairparts.com/air-conditioning/universal-underdash-ac-system-451.php

vintage air or hot rod air make universal kits as well, but you're looking at probably $1300 or so out the door.