1. Combine whiskey, brown sugar, soy sauce, water, Worcestershire sauce, lemon juice and garlic powder, mix well.

2. Place roast into a plastic bag; add marinade and seal.

3. Place in a dish; refrigerate overnight, turning occasionally.

4. Grill over medium coals (with Jack Daniel's Barrel Chips, soaked in water-if you can find them), about 20 to 25 minutes per side for medium.

5. Baste occasionally with marinade.

6. To serve, cut into thin slices.