A-Body Round #2- My '76 Scamp restore...

Check that the kickdown cable isnt hanging up. I don’t know if it’s the camera angle but the first picture seems to show the cable is pushing the far bottom edge of the fittings and the pic with your hand show that cable kinda at an angle. Double check that the lever is free to move down there when the throttle is open.
I think mine are at a tighter angle than yours between the intake mount and the firewall. I ve had the most trouble at the pedal on mine.
Prolly unnecessary but I have a 3rd spring to the front of the motor and I think I added a spring to the kickdown lever….hmmm