I had a MSD 6al box and the pro-billet distributor after the 6al box went bad i put the stock ford points distributor back in and carry a set of points and condenser with me. In my opinion unless you are on a race track that is the only time i see any reason for any aftermarket ignition system, they are good when they are working but when they break you can be left stranded. Old school break down insurance points and carbs