The item with a protective boot and single, protruding wire is an anti-diesel solenoid. It controls the throttle opening at engine idle to prevent dieseling. Engine dieseling is a condition that causes the engine to continue running after the ignition switch is turned off. It is a particular problem with emission controlled vehicles due to higher operating temperatures, higher idle speeds, leaner fuel mixtures, and lower octane gasoline. The solenoid is energized when the ignition switch is turned on, causing the plunger to open the throttle to idle speed position. The plunger length is adjustable so that the idle speed can be adjusted. When the ignition switch is turned off, the solenoid is de-energized and the throttle closes tightly, cutting off the air*fuel mixture. This will keep the engine from dieseling.
The item underneath it is an anti-stall dashpot. Its intended function is to prevent the throttle plates from closing too quickly when accelerator pedal pressure is suddenly released, which can cause the engine to stall out in some cases, especially with automatic transmissions.
I don't know what the one at the rear of the carb is, as I don't have access to the '78-80 fsm.
The item on the passenger side of the carb is the vacuum operated choke pull-off diaphragm.
None of these items, (with the possible exception of the vac diaphragm on the rear of the carb) are unique to the 2245 version, and were commonly found on the 2210 models also. The location and orientation of the above items May differ slightly between models, but not the function.
All the above info was taken from a combination of referencing an IH factory service manual and brief web search.