My 70 Dart

Looks like a pretty solid car for the northeast. I would cut out the rot and replace, the rust you see on the outside is usually just the tip of the iceberg of whats hiding behind the panel. Old hoods and doors are a good source of donor sheetmetal or if you get new stuff 20 guage works good. I like to use galvanized for anything down low, you just have to be carefull not to breathe the fumes while welding it. welcome to the board and good luck.