Preheat oven to 350 F and spray a 13x9 baking dish. Cook pasta according to package directions, drain in cold water. Dry on paper towels.
Place 2 cups of the spaghetti sauce into the 13x9 baking dish. Stir together 3 cups of the mozzarella cheese, ricotta and basil. Stuff each shell with this mixture and place stuffed shells into the baking dish. Pour remaining sauce over the stuffed shells and sprinkle with mozzarella cheese. Bake for 15 minutes then remove and sprinkle with Parmesan cheese. Bake another 10 minutes.