I've rebuilt three water pumps, all metal impeller. I do not recommend rebuilding the bake lite pumps because after thirty years, the ones I've seen have began to flake on the edges of the vanes and they developed hairline cracks and will crumble. I've got one metal impellar pump that has 7,000 miles on it with no problems, the other two have not been installed yet. The kits on Ebay from rainer in Germany are good kits and they are honest people to deal with, never had a problem with the seller.