Replace those corroded eccentrics with the new brake shoe eccentrics, sold individually, 8 required per vehicle or 2 per drum. Fits a 10" and 11" drum brake setup. These are used to set the proper lobe adjustment so you can adjust your shoes. These are made by JeepsterMan in the USA. Fits:
The product is much better than the original piece of metal. This actually seals the floor to prevent water from coming in, yet allows you to drain the floor if need be.