Trying to get my '73 Barracuda on the road and pinch a few pennies.Needing the rods and levers for the 4 speed. Found a used set off a '70 E-body needing to know if there is any differences in a '73. According to Passon Performance something changed in'73. Would like to know if it is interchangeable before purchasing the used rods and levers? Or might it be something minor that will still be doable. Thanks in advance. Scott