1970 Dart with no Headrests?

I have just purchased a very nice original one family owned Dart and it does not have headrests?
Am I missing something?
I am almost positive the car came this way.
It is untouched other than the hubcaps and I am not sure about them either.
Yes you are missing something.
headrests. As others, Jan 1 1969 and newer have headrests