Grilled Ribs with Spicy Harissa BBQ Sauce

Name: Grilled Ribs with Spicy Harissa BBQ Sauce
Ingredients: 3 tablespoons kosher salt; 2 tablespoons chili powder; 2 tablespoons ground coriander; 1 tablespoon ground caraway; 1 tablespoon ground cumin; 1 tablespoon garlic powder; 2 teaspoons ground mustard; 1 teaspoon freshly ground black pepper; 2 racks baby back pork ribs (about 5-6 pounds); 1/2 cup harissa; 4 ounces spicy pineapple ketchup or ketchup of choice; 1/2 cup water; 1/2 cup cider vinegar; 1/2 cup light or dark molasses (not blackstrap); 4 tablespoons brown sugar; 2 tablespoons cider vinegar; 2 tablespoons Worcestershire sauce; 1 teaspoon garlic powder; 1 teaspoon mustard powder