Hood Release Cable Broke

I haven't been able to find any information on this anywhere, and it's not addressed in either of the books I have. I have a 1973 Dodge Dart Swinger, and went I went to pull the hood release inside the car, it snapped off in my hand. The cable is severed right near the hood release handle. I tried following the cable up under the dash, but it goes up too far and looks like I'll need the hood open to replace it. Which sucks because I can't open the hood. Aaaand I don't know how to replace the cable and lever when I do get the hood open. Help?