Preheat oven to 275 degrees F. If necessary, trim fat from top of pork, leaving a 1/8-inch thick layer of fat. Spread Roasted Garlic Rub all over pork and inside any cavities, concentrating on boned side.Put pork, fat side up, in a roasting pan and roast in middle of oven 6 to 8 hours. Transfer roast to cutting board and let stand 15 minutes. Pull shreds apart with tongs into chunks. Serve.
Roasted Garlic Rub:
Combine all ingredients in a food processor. Can also be mixed by hand in a bowl, but make sure to combine well.