I have a set from a 70--but are you talking about the grease seal piece or the backing plate itself. When I took the 70's apart there was a small metal piece that seems to be meant to catch any grease that gets past the seal. That part disformed because the bolts spun on and disformed it, but it definitely is a separate piece from the backing plate for a '70. If you need the backing plates that the shoes are attached to, I have those...