Soak and cook beans according to directions. Drain. Drain pears, reserving pear syrup. Fry 4 slices bacon. Drain and break into pieces. Saute onion in bacon fat. Add with fried bacon to beans and place in buttered casserole. Combine 3/4 Cup pear syrup with molasses, vinegar, garlic and remaining seasonings. Pour over beans and mix thoroughly. Cover and bake at 300 degrees for 2 hours, stirring gently from time to time and adding more pear syrup if needed. Place pear halves over beans, spooning liquid from casserole over the top. Top each pear half with 1/2 slice bacon. Bake, uncovered, 30 minutes longer. Makes 6 to 8 servings.