I just picked up a 1979 300D with a non-functioning A/C. I’ve read about converting from the OEM compressor to an aftermarket compressor. I was thinking about doing something similar, although I would like to go with a more economical Ford or GM standard compressor and drier (and other parts, if necessary).

Although I am not an A/C expert, it looks to me like the 300 D A/C system controls are vacuum operated. [There is a unit next to the compressor that has several vacuum lines running to it and an electrical connection running from it to the clutch.] As most of the vacuum lines are shot on this car, I'd kind of like to convert it to electrical operation/control.

Any thoughts on where to start? Anyone done this before?