ok I have a 82 Z-28 that somebody yanked the a/c system out of. I wanna get some junk yard parts like the brackets that I know I have availible . I still have the stock condenser in there and the evaporator as well as the controls. Now what do I have to do as far as hooking the electronics? I know my 94 LT1 motor has alot of bs with it like the a/c clutch input and output wires and the high and low pressure switches. Do I need all that or can I just run a wire to the compressor without all that crap? I know itll get freezing cold but will I hurt it?

Or I might get the serpentine belt setup from GM which is a bargain no matter what your doing. It tops out at $660 I think and thats with a compressor, atl, power steering , water pump, belt , all pulleys and brackets and bolts. Or 440 without the compressor which I do have. but I still need help with doing that on the electrical side!

 

I'm not familiar with the specifics on the 82 Z's A/C system but it should be quite different from the 94 LT1 you referred to. The 94 uses pressure switches that feed to the pcm. The pcm controls the cycling of the compressor. Most old systems use the same pressure switches, low and high side, but they interrupt the compressor (I think ground side). When both switches are closed and the A/C control head inside the car sends 12v to the compressor, the compressor turns on. If the high side gets too high or the low side gets too low, the switch opens and turns the compressor off until the proper pressure is reached. Too much high side pressure can damage the compressor. Too little low side pressure can freeze the evaporator. In either case, too little refrigerant flow through the system can damage the compressor as this also carries some of the oil for lubrication. You can probably run the system as it was intended by using the high and low side switches. You would have to check a schematic or get your DVOM out, I don't have a schematic for your system. Hope this helps.

 

you need to replace the dryer too

 

I could just use 2 relays if I have to with the switches to get the ground path to it. Thanks for the info.

I also need the info to hook up ac in the blazer with the lt1 swap