[6pack] Checking vacuum pressure

[James_]

I have read several things about check for vacuum pressure. I am clueless. 
I think I buy a vacuum gauge (somewhere) and connect to the intake manifold? Maybe with a T connector so the original hose is connected. 
I am not talking about syncing the carbs. 
Anyone have experience and point me to buying a proper gauge and how to connect it?
I have a bleeder gauge with a trigger but I suspect this isn't what I need to use. 
Thanks. 


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