I ran across an 81 280ZXT in beautiful condition. The body is completely straight and there is no rust. I asked what was wrong with the car and the lady said it still runs but she thinks it has a thrown rod. The car has 100,000miles on it. I've never heard of a piston rod going out that early. I have a feeling it might have thrown a rocker arm. She wants 600 for the car. Anyone have any other suggestions what it might be?