Cook pasta according to package directions. Meanwhile, in a large bowl, combine the chicken, green pepper, carrot, celery, onions and peas.
In a small bowl, combine the sour cream, mayonnaise, ranch dressing mix, garlic salt, paprika and cayenne. Drain pasta and rinse in cold water; add to chicken mixture. Add dressing and toss to coat. Cover and refrigerate for at least 1 hour. Yield: 4 servings.