Nice car! You're going to be scouring Ebay for months. You need a single AC crank pulley, and that's available all over. But you won't find the AC 2 groove crank pulley to go with it. The water pump pulley you have will work.... but you should go to the smaller diameter. Again... you'll be scouring Ebay. Can I make a suggestion that will save you a ton of money and work? Go with a Vintage Air system. I have retrofitted a 66 and 67 GTO with factory air and it is NOT a back-yard job. You'll need to change a section of the firewall, find the correct inside and outside air boxes, dash controls, ductwork, bezels, wiring, etc etc. You can do a 'hybrid' where you install the interior vents to look factory, but even that is a ton of work. I don't have my parts book with me at the moment, I will grab it this weekend. If you haven't done so yet get yourself a copy of Paul Zazzarine's Restoration Guide, and you can get the GM shop and chassis manuals on CD.
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