1973 roadrunner

I have an opportunity to purchase this 1973 rodrunner in restorable condition. It is all original except the 318 engine is out of a station wagon. It has some rust. The quater panels need repaired, and appear to be hard to find. The body is fairly straight otherwise.
This is a factory small block car. It has a colum shifter automatic. Any ideas about the value of this car.