Looks salvageable to me. You should see the total and utter JUNK that people are here fix up because that's just what it is around here.

Put the doors and hood on it and get it rolling on whatever and I bet you can sell the thing whole for more than you could part it for. Any salvageable 68 Charger should be saved. Don't cut it up. People are cutting up too many good cars as it is, plus if it's rusty already, how many really necessary parts is it really going to donate to other cars anyway?