It seems to me it is a common practice to use the altered 5 version in place of the 4. Just get the vacuum lines connected accordingly. There are several articles about these switches on the tech page <http://1962to1965mopar.ornocar.com/techstuff.html> and there is a vendor in TX who will remanufacture your original to better than new (listed on the vendor page). Thanks, Gary H. -----Original Message----- >Can somebody with a parts book tell me if a 64 Belvedere with AC uses the same vacuum heater control switch as a non AC car? I'd like to know if I can use a 5 button switch that's been modified to 4 buttons like the one in my non AC 63 Fury in my 64 Belvedere with AC. > >Thanks, Dan ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.