[namba209]

Most of you know the fun I had getting an AC pump for Willit? that would work on the confined spaces for the V-6. The original GM Frigidaire pump wouldn't work, so I got a Delphi, part # 1136609 from a GM van that had possibilities, it is shorter, but it needs a table top mounting platform and, great for my engine, a serpentine pulley, and it does have the same hose hook-ups as the Frigidaire. I finally ended up with a Sanden SD7B10 unit from Vintage air. A lot shorter thant the Delphi, radial mounting lugs, but a different hose hook-up. Both the Sanden and Delphi need 134 referigerant, BTW. Here's a couple of pics of the Delphi unit and Frigidaire to show the hose hook-ups, and there are a few pics in my Willit? update thread of the Sanden unit. Figured I'd mention that you can get the Sanden pumps with single groove pulleys too. HTH.

Gerry, the vacuum switch was there to shut down the AC pump under full throttle applications, I do believe. It can be bypassed to make your system functional again, just have to be careful with the throttle when it's on.