Stock 'freeze-plugs' were plain steel (Dorman replacements are galvanized steel or are brass) and stockers are notorious for rusting through even if you are the 1 in 1000 owner that changes antifreeze every single year. I can tell you that only ONE plug can be reached for replacement with the Pantera's engine in place (left rear). So I suggest using brass plugs and paint them if you must for looks- brass is completely rust-proof. Galvanized steel is not.
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