I believe my 1964 \6 choke bimetallic spring is broken – Can anyone confirm?

It sure doesn't seem sticky, but it does seem it would benefit from a bit of a counterweight.

It's the original carb, as far as I can tell, has the original, correct part number on the tag, has a metal fast idle cam, and all of the pieces move completely freely. That was the first thing I checked.

Guess I'll have to do more checking.

Thanks,

– Eric