Trying to work off measurements is not the way to go unless you have known numbers to work from. With the multiple moving parts they may not be what you think they should be
The number I was looking for is the ratio of the shifter to the ratio of the trans lever.
If one moves 3 inches from park to low and the other mover 2 inches then the ratios are off. Meaning that a lever arm somewhere is too long or too short