That dash is either a 65GT or a standard 66 dash. The date code for the 65 door tag is May 28, 65 which could be a GT, except that is a T code (I6), so it cann't be a GT. The buck tag is a 66 Tcode I6, which the dash is ok for.
Since GTs are uncommon, this makes me think it is a 66 car...