Were the seats the same 67 through 69?
Thanks

No, 67-68's are pretty much the same, the 69's are totally different in appearance.

The seat back latches are different also from 67 to 68. I know this because I am currently searching for a seat back latch for my 67 car. 68's had a one piece lever whereas the 67 had a 2 piece.

69 had head rest

68 also could have a headrest.
Did all three years have the option of the front bench?

No bench was offered in a 69