There is a bolt and nut in the fail safe throttle return slotted bracket, that should not be there. That slot is there to allow carb to return to idle in case of linkage failure. Where the nut and bolt are, That spot should be at carb throttle link pin all the time, held there by kick down return spring [/url]

You are also missing the spring that goes between the throttle stud on the carb and the tp of the kickdown rod.

Yes the circled one. The kick down linkage should follow throttle all the time. Your kick down linkage is not moving until the pin on carb is hitting the nut and bolt. Just under that circle is a pivot arm pointing 90 degrees from vertical at curb idle it should be almost straight up. Some thing wrong at transmission, maybe wrong throttle lever.

I'm not seeing a spring in the yellow circle. Upon closer inspection, it appears that someone reused the one-barrel kickdown rod and hoked it to the two barrel bracket and U clip that bolts to the exhaust manifold. That is fine and can be made to work. That is what I did on my 76 D100. The catch is that it puts the kickdown rod in a different position than does the Super Six kickdown rod and you have to make sure that the linkage is all adjusted properly.

FYI- I can't recall if it was mentioned elsewhere, but that is a V-8 choke linkage piece.