Old 4100 Carb question. Were the manual choke carbs something "special"?

[M-train]

I've got an old "shoe box" 4100 carb, and its got a manual choke. Most of those carbs I've ran across had some type of automatic choke, so I'm wondering if this carb was on something performance orientated? [its a 1.08, not the 1.12]

Or wast the manual chokes found on thinks like trucks? The tag is missing so no numbers to tell anything.

 

[Midlife]

Manual choke 4100's were relatively rare, especially for Mustangs, restricted to the K code version. I have no idea about other FLM models, though...

 

[M-train]

Manual choke 4100's were relatively rare, especially for Mustangs, restricted to the K code version. I have no idea about other FLM models, though...

That is what I kinda suspected. I can't see Ford putting a carb with a manual choke on anything but performance vehicles, or trucks.

 

[Lightning]

Are you sure its not an e-choke carb converted to manual?