Dear Faust;
There just not needed, even in cold weather. With (auto choke) carbs just adjust it 'full open'. Sometimes; the buterfly/shaft are removed completly & discarded.
On the 3 carb set-ups, only the center one has the choke functional.
You will need to 'warm-up' during the winter months where you live. Heating your intake helps too, if your not using 'stock' exhaust.
The Corvette 6 used multi chokes just for starting, because they were 'sidedrafts'.
Good luck.
