What is this part?

[Agthomas2]

I inherited a 1975 280S checking all the vacuum lines.  What is this part?  Am I missing lines?  Are they important?

[Gpapaniko]

Can you share a wider shot to see where the part sits

[rumb]

0001410024

Vacuum amplifier.

[Agthomas2]

It has a few open nipples, am I missing lines?  Should they be capped?

[Agthomas2]

It sits on the radiator support by the charcoal tank.