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Well I found one on eBay that is broken, but looks nicer than mine. When I get it I will likely be in contact with Anthony P. Thanks for all the info, I really appreciate it.
I am using the 68-70 unit in our '66 Coronet. As said above you will need to test the new switch to make sure you are making the correct electrical connections. The switch only has three electrical connections. 1) Power to the blower motor 2) A/C compressor clutch and 3) Power feed to the switch itself.
This is an old thread but......I am not up to speed on all of the AC controller part numbers but I know there are a few that are configured differently even though vendors say they are super seeded numbers but are the same. (They are not) When dealing with the AC in my 68 Charger the correct number is 2820487. I have found that PN 2571501, 3431017, 3431020 and 3895790 all work the same as 2820487.
I have found that PN: 3895790 works a little differently as it will run the compressor constantly in defrost mode.
PN: 3502126 will run the fan on low when the ignition is on regardless of having all buttons in the off position. Other than those two differences, I guess you could make any of them work for the 68-70 B body cars. I currently have the 3895790 part in my car since I found a NOS one cheap and do not use the defrost mode much if at all so it is not a concern for me. Not sure about the 65-67.
Nice but mine just crumbled when you look at it. Arizona heat. After looking at the wiring diagrams and vacuum diagrams the 68 and up will work just fine with just a couple simple changes. Thanks though.