The very first thing you need to do is get the car where you can work on it and see if it even savable. A-bodies have serious rot problems in the floors and subframes, especially if sitting in dirt for 15 years or so.
Get the car apart and see exactly what you are up against. Just because it runs does not mean anything. Rust is a serious issue to fix, especially if you haven't done it before.
A Slant 6 Gold Duster will not be worth what you have in it when you are done if you are doing it as an investment. It will however be a wealth of learning for you and a really fun car to drive when you're done.
