Dart is totalled.. now what ?
The company I worked for had a 1975 Ford Van with nearly 200k miles on it involved in a similar accident about eight years ago. They just stuck to their guns and insisted the van be fixed and refused to accept anything else. Of course with a classic car you may not want to do that because then you have a car that has been wrecked and worth less to the buyer who does his homework.
I think if I were in your shoes, I would insist on a big *** bucket of money equaling the sum total of your investment.