[andrewsfm]

I can't circle anything in the photo because I don't know what I'm looking for looks like.

I'm looking for the main vacuum/distribution line from where the primary vacuum is created or maybe even the brake booster line.

Want to Seafoam the engine through the vacuum line but want to ensure it gets into all cylinders.

I gotta say I've never been familiar with the vacuum system and what it does and how it works so I don't know what exactly I need other than needing to evenly Seafoam the intake valves of each cylinder.