1920 carb rebuild question

I decided to rebuild my 1920 Holley carburetor so I ordered an Echlin kit from Napa. It came the next day but had absolutely no instructions. I need to know the following:

1) Where does the little ball bearing that came with the kit go? I know it's an important check valve but I didn't see anything fall out of mine.

2) What level do I adjust the float to?

I'd also like to know where I can find an exploded diagram of this carb.

Thanks in advance.