"This may or may not be related... the speedometer started acting up about 4 months ago. It would work intermittently. The odometer continued to work even when the speedo stopped. About 2 months ago, the speedo and odometer both stopped working."

For what it's worth, I've been told by several wrenches that the early elec. speedo was prone to do that. Mine did. Got one from a donor and it still works 3 yrs. later. Mileage the same? Anybody give a rat's!?? What happened to the rest of your cluster? On your own there!!