Wanting to Add Power Brake Booster

My Father has a 1972 Dodge Dart Custom 318v8. It has front and rear drum brakes, which he wants to keep. He just wants to add a power brake booster. I am doing the research for him and I'm kind of learning as I go. What parts are needed besides the booster itself? Does someone make a complete kit including pushrod, etc.? I just want to make sure I order all necessary parts. Any information is greatly appreciated. Thanks, Stacy Bouler