I just got my 99 GT and I want to do 60,000 mile maintenance. I am going to drain all the fluids and replace them with synthics (mobile 1) except the rear end I am going to use red line. My question is what does everone recomend for spark plugs. I am going to replace them but I don't know what to replace them with. Also is there anything else I should think about replacing at 60,000 miles