What is the stock speedo gear for a 97GT with a T-45 and 2.73's.? I have 3.73's with a 23 tooth speedo, right now. But I am switching to a Speed Cal and was told I need to swap back to stock speedo gear. I did a search, but all I could come up with is speedo count for bigger gears. I need to know the stock speedo with 2.73's and t-45..