My story of getting a Simca Six back on the road sixty years after it left the factory.
The Simca Six is equiped with a Solex 22 IAC inverted carburetor.
An excellent technical document “Technique de réglage et montage des carburateurs Solex No 16A” (PDF, in french) can be found here:
- Réglages buse K: 16mm - gicleur principal Gg: 90/100 - gicleur d’automaticité A: 220/100 - gicleur ralenti Gr.: 40/100 - tube émulsion: T22 - starter (air/essence): 5×105 
http://www.onkelinx.com/s6/reglagesolex_16A.pdf