Debating whether or not to spend the money and buy the Metco Double Bearing Kit for my car. I'm only running the Stock Eaton with a 2.8 upper. Is it worth spending $450 for these kits, or should I invest the money elsewhere? Stock pulleys have 47,000 miles on them. Let me know what your opinions are. Also, is it worth it to buy the Double Bearing Kit over the Single.