Hello. I have an '88 LX that came with the 85 MPH speedometer. YUCK! I just bought a 140 MPH speedo from a GT at the swap meet. I would like to roll the odometer back from 58000 to 50000 so that it will be accurate. In 10 years I will be 49 and won't be able to remember what my mileage is really supposed to be. Is there an easy way to roll it back? Thanks a bunch.