My truck is a 1996 with a 383 engine swap carburetor engine. I’ve owned it for a month now. Purchased knowing the AC doesn’t work but is all there. All the computers have been removed from my truck. All my instruments work. Seems to have been done right but I don’t have a lot of history on the build. System was never charged, dash controls all work, fan motor. My main question is I don’t have a cycling switch and no harness for one that I can find either. I was getting ready to start going through the AC and try to charge the system. I’m pretty sure a cycle switch is pretty important. Can I just add one? Is there an analog version of one that doesn’t need a computer? Do I even need one? Any help would be appreciated. I was thinking about just bringing it to a AC shop but looking for options first.