Quadrajet question

[Shadizarvan]

Hi Team. Just wondering what this part of my quadrajet is. What does the hose attach to and do I need it. It has been disconnected for the last 20 years.

quaddie.jpg

Cheers,

Max

[axistr]

This vacuum servo is designed to lock out the vacuum secondaries at low manifold vacuum, (during low engine RPM). If the secondaries open to early the engine will run rich and bog down until the engine gains RPM and a higher inlet manifold vacuum. The secondaries will open only a minimal amount at full throttle until the servo has enough vacuum to pull the leaver and unlock the secondaries so they can open 100%.

[Shadizarvan]

Thanks Lenny.
So it should be connected to any manifold vacuum source - not ported?
Cheers,
Max