Hello Walys60,
Another option (maybe I think) is to get a cluster from the other years (63-66?). Those should be more plentiful and in better condition. I think the gauge housing should unscrew from the back (the white part) and you can reattach it with your hardware and bracket, to your stock panel. They look to be the same but I have not done this (disclaimer). Kudos for keeping it original.
I believe the EBay unit is overpriced IMO.
Attachment 3708
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