However, some common vacuum line connections include:
* Power Brake Booster: This is usually a large diameter line connected directly to a port on the intake manifold. Often, this is a dedicated port specifically for the booster.
* Distributor (Vacuum Advance): A smaller diameter line connects to a port on the intake manifold or distributor itself. This provides vacuum advance for the ignition timing.
* Transmission (if applicable): Some automatic transmissions use vacuum for shifting, requiring a line to the transmission.
* HVAC System (Heater Control Valve): The HVAC system may use vacuum to control the heater blend door.
* Emissions Equipment (if applicable): Older engines, especially those with emissions controls, may have several vacuum lines connected to various components like EGR valves, air injection systems, etc.
To determine the correct routing for *your* specific Chevy small block:
1. Identify your engine: Knowing the year and model will help narrow down the possibilities.
2. Consult a repair manual: A Haynes or Chilton manual for your specific vehicle year and engine will have a vacuum diagram. This is the most reliable source of information.
3. Examine the engine bay: Carefully trace existing lines to see where they connect. Look for labels or markings on the components.
4. Use a vacuum diagram (if available): Some intake manifolds have vacuum ports labeled.
Warning: Incorrect vacuum line routing can lead to poor performance, drivability issues, and even damage to engine components. If you're unsure, it's best to consult a repair manual or a qualified mechanic. Do not simply guess.
