A/C in a 1966 Dart GT with 360

I would be interested in a close up of the firewall and of the underdash unit. I may be installing AC in a '66 Commando Barracuda. I did some research and found that the Classic Auto Air for the '67 might fit. Don't know for sure. I've also found underdash AC units on WalMart's site that might be good to use.