what does it take to put ac in?

[SPR1NK]

Or can I run the ac on a toggle switch and just use the panel in the cab I already have?

Toggle is kinda seeming like my best option at the moment, but I don't really understand how the wiring works between the compressor and the pressure switch

 

[SPR1NK]

On the panel I pulled out of the parts truck everything is vacuum for the defrost panel floor select, on mine it's just the fresh air door

 

[SPR1NK]

I would post pics but I can't figure out how to on my phone