67 Barracuda Bucket Seats

RedFish said
The link you posted takes me to a divider panel. Anyway... I can tell you the 67 B'cuda shared headrests with Dart and b-body. These are not the oval pads w/chrome band. Correct for 67 is a triangular/wedge shaped pad.
There were variations in headrest post spacing also, so I don't know if the 68 and later oval headrest will work on a 67 seat frame.

To complete Redfish’s post for future reference for all looking to add headrests to ‘67 barracudas the holes in the seats are different between the three years. ‘67 measure 7 1/2” and ‘68-‘69 measure 8 1/2”. The headrests are not interchangeable. I just purchased a set of oval ‘68-‘69 headrests and they are too wide. The pictures confirm the post to the OP original question. Redfish states b-body triangular shapes headrests may fit as listed in his post.

1967 seat back

1967 hole spacing

1968-1969 headrest

8 1/2 spacing