Need help identifying this metal line coming out the back of my carburetor

[Truck82]

The title explains this post. What is this metal line coming out the back of my carburetor for? Is it needed or can it be capped off?
This is a mid 70s (I believe 1977) Rochester 2gc carb.
Thanks so much for the help in advance, everyone!

 

[DoubleDingo]

The 3/8 tubing? Brake booster vacuum signal for power brakes.

 

[DoubleDingo]

If you have power brakes, no it can't be capped

 

[Truck82]

The 3/8 tubing? Brake booster vacuum signal for power brakes.

I’ve got hydroboost brakes so this line is not going there.

 

[Truck82]

This line was tied into the vac line that went to the cruise control when it was a diesel. No more cruise control, so can this be capped?

 

[DoubleDingo]

Unless you have other items needing a large vacuum port, cap it. I say cap it, when I mean plug it with a brass fitting of the correct size

 

[Normmus]

Not needed if your brakes don't have a vacuum boost.

 

[Truck82]

Unless you have other items needing a large vacuum port, cap it. I say cap it, when I mean plug it with a brass fitting of the correct size

Thanks I’ll get a fitting and cap it off

 

[Truck82]

Not needed if your brakes don't have a vacuum boost.

That’s what I needed to hear. Thank you
Just wanted to know, can any vacuum port be capped off? Assuming it isn’t needed on the vehicle.

 

[Ricko1966]

That’s what I needed to hear. Thank you
Just wanted to know, can any vacuum port be capped off? Assuming it isn’t needed on the vehicle.

99 percent of the time. If in doubt post,sometimes they are a vent,not a vacuum line.

 

[3 Ton]

Also used for tranny vacuum in some instances.

 

[JD Miller]

Hook up a duck call to it

 

[Ricko1966]

Also used for tranny vacuum in some instances.

Let's leave the trannys out of this.