[Riveted1]

Bigdav, thanks for the info. Yes, the oil on the foam is from a leak I think I fixed already. The coupling right there was loose. I will go out there shortly and take the foam off so I can get some pics of what is going on under there.

I did stumble across my Chassis Service Manual for my '67. It's got GREAT pics of all of the AC parts and info on how it all goes together. I wonder how much changed between then and '72, and if the '72 manual has good pics of how everything goes together for the dual ac.

Through the manual, I also found out that the thing I thought was a drier above the compressor on other ac systems was a muffler for the compressor. Learning new stuff every day!