Keeping things original doesn't always make good since, I have 15 old Fords and I keep them mostly original but for safety and reliability I do change things.
I always convert the ignition system from points to Pertronix electronic ignition, I always go with a dual master cylinder for safer braking, I add a recovery system for the radiator as it helps with the cooling as the radiator always starts off full and a electric fuel pump because ethanol like to eat up the mechanical pumps and also helps to prevent vapor locking.
I do nothing that can not be easily reversed, if you need to keep your car original for judging purposes that's one thing but doing it just because it came that way is not always the best way to go.