Spal fans are about as good as they get for electric fans and pullers work much more effectively that pushers. If you don't have a Spal, you might want to look into one of their straight bladed units which pull the most air. Have you looked into any of the products you can add to your radiator fluid to bring down the temperature? Are you hood side solid or vented? If they are solid, you might want to look at getting some that are vented if nothing else works.