So I’ve got a rolling project right now. It’s a 1977 corvette and the brakes recently went stiff and can barely stop the car. I know there’s a small leak between the master cylinder and booster and I’ve refilled the rear reservoir 3 times in 3 months. I’ve looked online for an answer about replacing both parts at the same time vs just replacing the master cylinder but there’s nothing solid to go on. I would rather not ask on FB in our group since a lot of the members can be little help or just flat out toxic.