Just found out that some of the new GPS speedos have a programming fault that will make them read high mileage on the odometer. The 427MK4 I am building for Bill has 6777,756 miles showing on the odometer but only 7.7 miles on the trip meter which is the actual miles on the chassis. Speed Hut will fix it for free. This is the new ones with the turn signals and HB indicator in it. Maybe some one else may have this problem down the road. Hope this helps.