1.  Engine crankcase breather.
2.  Manifold vacuum source to be connected to de-accel. shut-off device item 5.
3.  Distributor vacuum advance source (spark port).
4.  EGR vacuum source.
5.  De-accel. shut-off device (diaphragm) vacuum connection (connects to item 2).
6.  Idle Mixture screw.
7.  Idle speed screw.