See Brian's pic of no bead and no decor strip on door. The reproduction seals currently available with the bead are a little ill-fitting around the rear door curve, they tend to just angle upwards to the high point, kinking the rubber strip if you try to match the door edge curve. The plain versions do too but at least they are somewhat flexible. Adding a few slits helps too.
Also, if seeking the correct strips for a Firebird you want them with the round bead, not the flat Camaro bead. Many ads will not mention the difference originally, just what they suit and can be used on. There's a few new repro seals out there that may be good, and a round bead may also be easier to shape if needed.
Original GM strips are now expensive and hard to find, and the rubber seal depends on how it was stored for decades.
