The sheet metal in the engine bay has a few patch panels (some welded, some riveted), the main frame rails have some 90deg sheet welded over them, the floors have been replaced etc. The car has definitely had some work done in the past but most of it is in the open and no rust is showing through the paint or anything. There doesn't appear to be any patches in the rear of the chassis although I wouldn't be surprised if the body was full of bondo. Its going to be a autox car for the most part so it doesn't have to look pretty, I just want it structurally sound.