Jackie Clay's Ham and Beans

This is from Jackie's column at Backwoods Home.
Jackie Clay's Ham and Beans
2 qts. dried navy or other smaller beans
1 lb. thickly sliced bacon or salt pork (or ham)
6 large onions, diced
1 1/2 cups brown sugar
4 tsp. salt
4 tsp. dry mustard
1 1/3 cups molasses
Sort beans, rinse, then cover with 6 quarts fresh water; let stand overnight in a cool place. Drain. Cover beans with 6 quarts water in large stockpot. Bring to boil; reduce heat. Cover and simmer until skins begin to crack. Drain, reserving liquid. Pour beans into turkey roaster or other very large baking dish. Add bacon,ham, and remaining ingredients and 8 cups reserved liquid. Ladle sauce over beans and bake, covered, at 350 degrees for about 3 hours. Add water or cooking liquid to keep wet enough; you don’t want them dry but watery. Pack hot beans and sauce into hot jars, leaving 1 inch of headspace. Process pints for 80 minutes and quarts for 95 minutes at 10 pounds pressure.