I seem to remember hearing (or reading) somewhere that although the 67 models had in dash A/C there was an underdash unit that was a dealer added option. Can anybody confirm this? If so is it the same under dash unit that was used in the 65-66 models, or did it differ? I'm really not sure because I cannot seem to find an under dash unit for my 67 that is (or looks to be) a faithful repro of the origional unit. Also can anybody tell me if the 65-66 under dash unit can be mounted in the 67 without a special kit or alterations.