I noticed over on the main site under specifications, the final drive ratio for the MTX3 is listed as 3.33. Is this accurate? If so that's going to throw the speedo on my Topaz off once the MTX4 is installed since it has a final drive of 3.73. If this is true I'll probably have to swap in an instument cluster from a sport model Tempo to keep things accurate. Or can my speedo be recalibrated somehow for the new gear ratio?