Another small update: I knew buying a first model year car would have unique issues. This is another one of them. The car uses a dual filament bulb for the front turn signals, parking lights, and DRLs. The dimmer 5w filaments are the parking lights, the brighter 28w filaments are the turn signals and DRLs. Turns out making the DRLs the full-brightness turn signals results in the bulb sockets getting burned after being run for so long.
Picture (from another Dart owner, this is not my car):
The 28w filament gets too hot and burns the plastic socket over time. The socket can be replaced fairly easily, but I'd rather not have this be a wear item. So, I've deactivated the DRLs for now, and in the future I will be replacing the bulbs with LEDs. Which I wanted to do anyways because the front bulbs are the only non-LED turn signals on the car; the rear and mirror-mounted turn lights are LEDs already. Once that's done, I'll reactivate the DRLs.
I'm probably going to wait until I have enough money to also buy the black headlamp housings and fascia applique to give my Dart the signature 'black fascia look', since changing the fascia applique and headlamps involve taking the front bumper cover off and will give me better access into the lower engine bay to mount the LED load resistors.