Another kickdown question

Several companies make cables for the kickdown. They work well, EXCEPT, you usually have to play with different length arms either on the carb/throttle body or transmission to get the ratio correct. Mr. Gasket or someone does make a correct length arm for the carb but I think it only works on a holley. I had to prefab one for my setup to get it to have enough pull to shift out right from 1 to 2 and still not come to the end of travel at the tranny before the throttle was open all the way.