I sent pictures of my latest find to a friend who happens to own a machine shop, he builds engines and has a very exstensive data base (in his head) with regard to anything automotive.He has a tip on averting electolysis in the radiator core. This is what he said to do. Go to any hardware store and buy a temperature pressure valve for a hot water heater (cheapest is good). Remove the zinc anode and cut off a 3" strip. Drill and tap one end for appropriate screw. Solder eyes on either end of a length of solid core (copper) wire. Attach one end of wire to the zinc anode, place it in the radiator overflow and attach other end to a suitable ground, like the frame. This allows the electrolysis to take place in the overflow rather than the radiator. Zinc anode requires replacement about once a year. <img src="/forums/images/graemlins/kewl.gif" alt="" />