i cant remember what headliner to buy for my 68 ss. i see a listing for a coupe/sedan and another listing for a coupe- 6-bow. i only have 5 bows in my 68 but there is a spot for a sixth bow. never been used, dont have that bow and the previous headliner fit just fine and great. the bow that is missing (maybe its supposed to not be there...) is right between the very front bow and the middle (domelight) short bow.

which one do i need?

You need a 5 bow coupe. Sedan is 4 doors.