IDK how different the 68 box is from the 65/66 factory AC box, but I got the early box rebuild kit from DMT, which consisted of all the interior insulation snd other stuff. I have 3 complete units so I picked the best box of the 3 to rebuild. I had a couple of NOS switches and dodads I bought years ago that i used. The hoses were in great shape so i reused them; likewise with the vacuum actuators. I see those actuators show up on eBay so that’s an option. I used a flush on the evaporator and condenser and installed a new heater core while it was apart. I sent my engine compartment components (hoses and compressor) to Classic Air in FL who rebuilt the compressor and restored the fittings and replaced the hoses with new. I used a NOS 67 - later switch assembly because all the ones I had all the vacuum connections were broken. I never did find one for an early A. The underdash box is installed, waiting for the rest of the system to get installed. I found a AC- specific manual for the 65/66 era which made the job immensely earier.
