ok, since the activity in this thread came to a screeching halt, how about I add more pictures and confirm that previous chevy carb number;
Chevy carb number: 7029223
Sorry, I was tinkering on, and taking apart several carbs, and got the numbers mixed up.
Here is the fuel bowl vent cover, and the pieces which attach to the top plate (that are concealed by the cover):
That cover is what I was wondering initially about.
Now, here is the Pontiac carb from which I took those parts off, as well as the original chevy carb top plate which I removed some of these parts for another carb;
I also have two "buttons" placed in between the top plate and complete top, because I have seen these (one is placed upside down, the other is right side up) on these early vented top plates replacing the original vented setup (I also have some spare early pump levers if I can find the associated parts to combine them with.
Thoughts?