Thanks for the info. I think I have all the pieces, except for a system on switch. My 280Z had the evaporator mounted in the center of the car behind the ac bezel. I found a thermostatic switch to mount on the side of the evaporator box. The factory air setup had a lot of other switches under the hood that mine did not have. I have a spot in the console to mount a lighted push-push switch. I will try to post a few pics when I get the system in place. Brad '75 280Z