Barbecued Chicken

3 whole chickens (cut in halves)
1/2 cup Italian salad dressing
1/4 cup oil
5 tablespoons vinegar
2 tablespoons Worcestershire sauce
1 tablespoon salt
1 teaspoon pepper
2 tablespoons lemon juice
4 tablespoons butter

Marinate chicken halves for 2 hours in above ingredients. Place on smoker; put drained liquid in bottom of pan. Hickory chips or crab apple sticks may be added to coals. Cook for 5 hours.