Dusty,
I made a quick and dirty diagram for your that will hopefully clarify.
Rochester 1B Throttle & Choke Linkage I made up my own terms for these parts. They are titled in green.
The two parts that appear to be wired together in your pic are on this diagram as "choke arm" and "fast idle cam".
The way the mechanism is supposed to work is that when the "choke arm" is fully engaged (choke ON), the fast idle cam rotates and bears upon the throttle stop lever. The throttle stop moves clockwise (in this pic) raising the idle speed.
When released the throttle stop plate moves back CCW and returns the idle speed to its normal setting.
The amount of fast idle speed increase is based on the throw of the choke cable (how far pulled) and the profile of the fast idle cam.
Hope this helps.
Jason
