67 Barracuda bucket seats??

1967 seats had a unique hard back cover that wrapped around the sides that '68-'69 seats didn't have. They also didn't have a catch to keep the seat from folding forward on a hard stop. There's a possibility that pre-'67 seats might be the same but I'm not sure. I'm not sure if '67 covers will fit later seats as I haven't had the back off to see what the frame looks like, but I kind of doubt they will work.
'68 and '69 seat frames and seat covers are interchangable (with each other), the only difference is that headrests became mandantory in Jan. '69 or so.
Dallas