I want to "modernize" my 65 /6

I have a 65 4-dr Dart that I have done a lot of work on from a safety standpoint. It is an auto-w-original trans, MPB disk kit, Seats-w-shoulder seat belts from a Seibring. I'd like to get some ideas of what others have done to their interiors to make them more like a modern vehicle.
Any options and ideas are appreciated.
Thanks-Howard
Hampstead, NC