The cluster is out, you won't believe what I found

Re the speedometer, when I got my 65 Newport, the cable was broken. The spinning magnet had become wobble and grabbed the aluminum cup. Good the cable broke since otherwise the cup spurs would have broken as in yours. I mailed the spinning magnet part to a speedometer shop that rebuilt it w/ a bronze bushing (~1991). You might be able to use epoxy and fiberglass to re-connect the broken cup. It doesn't need electrical contact. The magnet applies a force to it, I suspect via eddy currents and/or "di-amagnetism".