It was also an anniversary for us as it was 41 years ago to the day (6/29/66) that my dad traded in a 1966 Mustang for the the 1966 Corvette. I'd say he made the right decision!
Looking at your dash brought back memories of my first - a '67 Vert. You must really be proud that your Dad still has his Vette and he is still around to enjoy it! Alto my Dad never had a Vette he was Chief Engineer of the Tucker Car Corp back in '47 & '48 and I got to ride in his car; a Tucker!!!