I'm in the middle of restoring my 66 Kelsey Hayes Disc Brakes and been looking around at photos on and restored pictures and I can't seem to find anything on the dust shield retaining plates. See attached picture. Basically everything I've seen are just hex bolts holding the dust shields to the arms, but these are these plates with flat bolts that sort of notch in against the ridge of this plate to keep them from turning. Anyone seen these before, I don't seem to find any photos of even unrestored versions of these.
Thanks,
Jason