How much rust is too much?

It's like building a house, you have to start with a good foundation. I voted for parting it, if it was a rare car, like the cuda, that would be a different story. But, I'll bet you can find a rust free body for a reasonable amount of money from a dry state. My dart came from AZ and for a 63 it had less rust than my 97 Ranger had on it.