emergency/parking brake help

I have a 70 Dart with drum brakes: First time they checked the parking brake in 3 years at inspection and the handle didn't budge. I starting lubing the assembly under the dash and the exposed cable under the car and am now able to get the handle out 2 inches, enough to click into place and the light to go on but there is no brake pressure being applied. Should I continue trying to free it up or just go for new cables. What would I need for cables, front and rear or is there a middle section as well? Thanks