Running / parking lights only use one filament, the second filament is for the turn signal / 4 ways. May I suggest , re-check / clean ground on the drivers side lighting harness.
Now the fun begins just doing the little odds and ends at your own shop at your pace. Enjoy.
once I replace my broken SureGrip, we should have a match race....... your Dart vs my silver, coffee getter Hemi Duster.
The FABO crowd can side bet. Who wants to hold the $$$$ ?