I have a '65 Mustang with a 170 ci and have replaced the original points with a Petronix ignition. I've replaced the distributor, plugs, carb, alternator, coil, and other items like the vacuum and fuel lines. I timed it using a timing light and also made sure that the manifold pressure was in the green. It fires up immediately, smooth and responsive under load, but noticeable hesitation at a steady throttle. I have attached a report that I put together. My dad bought this car for my mother in April of 1964 (early model), and it means a great deal to me.