Bill, I love you, man. But all the dual plug heads and belt drives in the world aren't going to make you a better racer. It's all great in theory and tons of fun to have when it all comes together but there are serious development steps to get around. Ask me how I know. My unsolicited advice is to get a reliable bike first and work hard on technique. The guys out there riding circles around us have many years more experience honing their craft than we do. A bone stock bike is going to allow you to work on Yourself more than a hot rod that you spend more time fixing than riding. As your working years are now behind you, you have an opportunity to get a lot of track time. Get on it like flys on poop!
Peace and love