The post is fine, but does not show much about th efine tunning of the low end.
Also note that it describes a carb with low end needle, while yours is airbleed, as Mike has explained above.
Jester's advice above (Post #11) is very important in this case, since you don't know the history of the engine.
Check this article out:
http://www.*********.org/cars_eng-tuning.htm