'67 Dart - No stop lights, turn signals on but don't flash

67 would have a "round back" alternator. Problem is the cores are few and far between, so what you will get from the parts store is a "square back", modified to work in a 67.

Both alternators will work just fine.

There are many posts about round back single field wire alternators vs. square back 2 field wire (also refered to as isolated field) alternators and their respective voltage regulators.