Jordan Babineauxs Gumbo Texas Style

Name: Jordan Babineaux's Gumbo Texas Style
Ingredients: 1 cup cooking oil; 2 1/2 cups flour; 2 stewing chickens; 3 tablespoons garlic powder; 2 tablespoons black pepper; 1 teaspoon red pepper; 2 tablespoons salt; 2 tablespoons dried basil; 2 tablespoons dried rosemary; 2 or 3 cans oysters; Cooked rice or crackers, as an accompaniment; 1 cup green pepper, diced; 1 cup celery, diced; 1 cup onion, chopped; 3 pounds smoked sausage, sliced in thin pieces; 2 pounds crab legs; 1 pound shrimp, cleaned and deveined