I feel your pian. I spent 3 yrs all Over the US Looking for a 100% rust free 70 Dart that hadno sheetmetal replaced and no bondo no wrecks. I gotlucky and has gerta timing i bought it at the height if the recrssion from a guy who was trying to keep his business afloat. i found it in Nevada in the desert perfectly preserved with fresh paint. The /6 smoked and burnt 32. Qts of oil in the 3000 miles to fl. Net a problem i had a fresh 360 magnum to install. Price $3500
If you have plenty of time and you are keeping the car, go for it. However from your description of the car i would say that after a Complete resto you will have more in the car thann its worth and will be probably able to buy a Similar turn key one, maybe not as a pristine for less.
