That 722.1 transmission should have a control pressure rod which is part of, attach to the angle lever on injector pump. It’s a push pull set up, look for the rod on the passenger side of the engine going down to the transmission, make that rod shorter by turning the ball socket. You may need to set up/ adjust the linkage rods.

To check the kick down solenoid and electrical circuit. Open the passenger door with the ignition on depress the throttle pedal to full throttle , you should a hear click at the side of the open door, if not , blow fuse or open wire to the solenoid, bad solenoid or the pedal is not fully contacting the KD switch or a bad switch under pedal.