68 how do you keep the parking lights on with the headlights

My 67 dart park lights turned off with the headlights on, but my 68 cuda stays on with the headlights. I was just under my dash replacing the h/light switch because the rheostat fried, and the harness hasn't been modified. Now if I could just get my freakin dash lights to stay on....... Main harness PC connector is toast.