1965 Dodge Dart 270 wagon

I was just looking at the pics of your engine compartment. If your drier is open to the atmosphere at either end, that will not be good. When I sent my drier to Classic Air to be rebuilt with new dessiccant they advised me to not uncap it (at either end) until just before connecting both the line/hoses and the system ws no longer exposed to the moisture in the air. If yours is open, it mill probably need to be rebuilt. Just an observation!