Swapping out non working speedo/adding a radio

Since cluster is to be removed, the extra work recommended is a good idea. Dashlight bulb holders don't need to be replaced, just the contacts cleaned and bulbs checked. These are old cars, so I recommend a little steel wool on the contacts (2 on each) as I don't think contact cleaner is heavy duty enough. It would be good to check all screws and electrical connections while you 're there.