Air conditioning options?
In related news, note the 74 Dart factory AC with a 2-groove w.p. pulley. The inner groove lets the AC belt clear the w.p., the same as the idler pulley in the Volare bracket. Note the 2-groove cast pulley on my 74 Dart engine that bolts outside the damper. Best guess is the outer groove was for either after-market AC or for a CA smog pump. That engine didn't have an inner crank pulley, so probably never had factory AC. Finally, note the factory AC on an 86 Dodge truck, using the newer Chrysler compressor (also on some Volare/Aspen). Cool that the slant engine was still used in 1986, but only in trucks due to their slacker emissions requirements, and even longer outside U.S.
Thanks to the websites where I found the photos of the 74 Dart, 86 truck, and 78 Volares. I would credit you if I had recorded each site.
Finally, sundry details on my 64 Valiant that may puzzle some. I am using a new AC condenser for a Honda Civic (or Accord, forgot), because it was cheap on ebay ($22). I then found that those "peanut" fittings are non-standard and hard to find, but managed to find hoses, and have a crimper to make the other ends.
I plumbed a Walbro pump for later EFI. The silver can is a low-pressure fuel filter w/ return fitting that has the same fittings and size as the Corvette filter/reg I will later use. I will have to re-bend the front fuel tube to get past the Volare AC bracket.