Power brake vacuum

[bax]

I have 2 choices for vacuum. one on the intake and one on the carb base. what is the best one to use?

 

[dbevans2249]

JMO the intake as close to the carb base as you can if there is more than one choice.

 

[turbotim2]

Intake, gets my vote.

 

[broncnaz]

If the port on the intake is on one of the runners I'd consider using the one on the carb.

 

[Viperwolf1]

I look at it the other way. PCV is always flowing air and should be the one that is more evenly distributed to all the cylinders. Hook that one to the carb base and the vac booster to the manifold.

 

[rwill]

My vac booster is hooked to the manifold. No issues.

 

[Broncobowsher]

I look at it the other way. PCV is always flowing air and should be the one that is more evenly distributed to all the cylinders. Hook that one to the carb base and the vac booster to the manifold.

That's my feeling as well
X2

I also theorize that the runner pulses might pull a little harder then the combined common plenum. After a few pulses you might get a slightly stronger vacuum in the booster.
The booster isn't always flowing, just as you release the brakes a little air goes into the engine. One cylinder a little lean for a couple if firing pulses will be just fine.