Here we go. I have a 1964 Dodge that has a '63 Big block 727 transmission. The rear end has been updated with 3:73 gears. Rear tire diameter is 26.5". Picture attached is from 63 service manual. Need to know what diameter an original 700 X 14 tire would be and which gear to use, to get speedo close. I have had NO luck trying to get a ratio adapter for this car. The output shaft has 8 teeth. Need to factor in the difference in tire size and no correct choice for the new gear ratio. Thanks!