Early 70's A'904 Torqueflite downshift

The VB you have pictured has the part throttle 2-3 kickdown module. They didn't have anything better. If the Trans-go kit had you grind down the TV valve (the TF-2 kit does but not sure about that kit) it will lower the RPM that it shifts into at WOT. I only grind the valve half the amount they say in the TF-2 kits. You can always back off the TV adjustment but if the valve is too short you can't do anything but pull the VB back out and change the valve. Not sure why they recommend grinding it so far