Vacuum Advance - Manifold or Ported

[MaSnaka]

Ok you guys...which vacuum port on the carb is manifold and which is port. I have a Holley and have my vacuum advance hose hooked up to the small tube on the choke side (passenger side, USA) of the carb body. There are 2 tubes, 1 larger and 1 smaller on the front side of the carb body which are plugged up with rubber caps. With so much discussion on manifold vs. port vacuums I'd like to know what my set-up is. Thanks!

[mr0077]

MaSnake, you're on the ported source. I think the ones on the base plate are manifold vacuum.

Kennyb, vacuum advance is max when the engine is idling/cruising only if using manifold vacuum as the source...but vacuum advance is zero at idle if using ported vacuum.