Wash and soak beans overnight in water to cover. Drain, place in saucepan, cover with water and simmer until skins burst, 1½ to 2 hours.
Turn beans into bean pot or heavy casserole without draining. Combine salt, brown sugar, molasses and mustard with 1 c. boiling water; pour over beans.
Scrape pork rind and cut gashes in fat ½″ apart. Press into beans