Jon,
Very interesting! However, at the risk of running it into the ground, I will pursue it further.... What is the difference between the following:
788S size 3 manual choke (1950 and newer engines)
966S size 3 manual choke (1950 and newer engines)
2100S size 3 manual choke (1950 and newer engines)
Also, what does the prefix "Z" mean?
Thanks - Scott