Leaking windshield wiper pivots
Detroit Muscle Corp (DMC) and many others sell a $15 fix it kit on ebay for both wiper pivots. I did that on my 65 Dart and about to do so on my 64 Valiant. I installed the grease fitting to lube the shaft. I had the under-dash parts removed in the Dart, so real easy. I also de-rusted and painted everything while in there.