[928SROCK]

should I change the timing belt or not that is the ??????? I have a 1980 928 66k miles runs perfect I bought the car from the wife of her passed on husband. She has no records with the car but the car has new brakes new tires and new Borla exhaust. Theres no rust and the car looks perfect. I drive it twice a month. I don't beat on the car at all. My question is without knowing if the car had the belt replaced what would happen if the belt did go, how much damage could it do the engine? I dont want to just replace engine parts just because. I usually go by the theory that if its not broken don't fix it. What would you do and is there anyway to tell if its time to change it or should I just drive it and stop worrying thanks