Best way to remove the clock for repair?
Remove the steering wheel. Remove the four thumbscrews that secure the instrument cluster. Disconnect the speedometer cable. Unplug the electrical connections. Remove the instrument cluster. Remove the clock from the cluster.
Get flat on your back and remove the two thumbscrews from below and the square u bracket will be freed, disconnect plug, clock light wire, power and ground. push it front and out. Did you buy the ebay clock for $500? That seems much lower price than retail