OK- - - -instead of having the spring clip on the throttle linkage, the throttle cable needs to go through the hole in the shaft and have a round piece of brass with a setscrew in it clamped onto the cable. That allows the gas pedal linkage to slide up and down on the cable freely, but a higher idle speed can be set by pulling on the throttle knob on the dash. Then all you'll need to do is sort out the fast idle cam in relation to the choke bell crank. Some parts are obviously missing, or assembled incorrectly there.
Jerry