Advice on Brakes

My 65 Barracuda has manual drum brakes all around, with the single piston master cylinder. I've been considering maybe changing them, for safety purposes, after hearing stories of people breaking a line and losing their brakes entirely...which isn't a pleasant thought. But I'm all about keeping this car how I found it. I'm weird about that. I'd just like some advice on whether to change the brake system, or just leave it. I'm really indecisive.