So new question. The 40 has a 350th trans however there is no kickdown cable from it. It looks like the hole where the cable would come from is plugged. Is this some kind of mod that can be done to a 350 trans ?
The kick down assembly also raises line pressure as the throttle is opened to keep the clutches from slipping during wot shifts. Without this function the trans will always shift soft and wear the clutches. Not good for a long lasting trans.