Project Car Advice

I am looking for advice for my first project car. I have been looking around for a 2 door of any brand but also want it to be the first car that I really learn about, modify, and maybe do my first engine swap with. I love to race but also enjoy daily driving said car. I do want an older car so I can fully restore it and work on it to eventually put out 400hp. Does anyone know any cars in the 5k price range or lower and What was your first project car?