You need to extend your linkage to where pretty much when the throttle is tipped the KD linkage is also starting to move which means the slotted rod(w it's seperate helper spring) is all the way back to where the front of the long slot is contacting the carb horizontle piece and at wot(eng off/gas pedal mashed to the floor the lever at the trans is all the way or close to all the way rearward and a non manual VB trans should not be shifted thru the gears manually.