Rinse and soak the dried beans in cold water overnight, then drain.
Simmer the soaked beans in fresh water for about 1.5 hours or until tender. Drain and set aside.
In a skillet, sauté the diced salt pork or bacon until crispy, saving about 2 tablespoons of the rendered fat.
In a saucepan, combine the saved fat, brown sugar, molasses, apple cider vinegar, yellow mustard, and smoked paprika. Simmer until the sauce thickens slightly.
In a greased baking dish, layer the cooked beans, crispy pork, and sauce. Repeat layers twice.
Bake uncovered at 300°F (150°C) for 2 hours, stirring every 30 minutes.
Check the beans for tenderness and ensure the sauce clings to them without being runny.
Let the dish rest for 10 minutes before serving. Adjust seasoning with salt and pepper if necessary.