Power brake vacuum on a 1970 Swinger 340 help needed

[Ooh barracuda]

I just had the original carb rebuilt for my 1970 swinger 340.
The car now has an edelbrock on it.
I would like to know where the power brake vacuum is supplied from on a stock 340
can anyone help by posting a picture of their car or a diagram?
THANKS IN ADVANCE !

 

[mguner]

A nipple screwed into the rear of the manifold also called a vacuum tree because they usually have the large 3/8 nipple and one to three other small vacuum nipples coming off of it for things like the AC mode actuators and the water control valve for the heater.

 

[Ooh barracuda]

Thank you