The car in question has sat for the past 4 years. Owner health issues. I am helping a friend who purchased it from his aunt get it running again. How concerned do I need to be with the master cylinder and brake cylinders after setting that long? It goes with out saying I will be replacing all of the fluids, including purging and refilling the brake lines with fresh fluids. My fear is deterioration of the rubber parts and loss of brakes. It is an awful nice convertible with only 58,000 miles showing on the clock. Same owner for the past 36 years or so