Valiantguy.
If I were only 13 and had a car to work on (I was 13 once) I would just concentrate on the body work first. You should be trying to figure out what color you want. If there are any parts you need. Upgrade the brakes, suspension, interior.
Use the next few years to decide what you want the car to do, street, strip or little of both. Once you figure all that out it would be better for the folks here to give you advise on what parts will do the best for you and your car. Like vynn3 stated above, you can throw a lot of parts and money into a motor but if not PLANNED it will do you no good for what you want the car to do. But like I said earlier I was 13 at one time and wanted it all. So get some paper and start writing down what you need for the car and I'm sure we can help you keep the MoPar sprit.
BTW Mike has the Offenhauser intake you are looking for from Summit.