Tools You'll Need:
* Dwell meter (highly recommended): This is the most accurate way to set the points.
* Points file: To clean the points if needed.
* Feeler gauge: To check the point gap.
* Wrench (appropriate size) for the distributor hold-down clamp.
* Socket and ratchet/wrench for the distributor. You might need a breaker bar depending on how tight it is.
* Timing light: To verify timing after setting the points.
* Owner's manual or a shop manual for your specific year and model: This will provide the correct specifications for dwell and point gap.
Steps:
1. Safety First: Disconnect the negative battery cable before starting any work on the ignition system.
2. Locate the Distributor: This is usually on the top of the engine, near the carburetor.
3. Clean the Points: Using a points file, carefully clean the contact surfaces of the points. Avoid excessive filing. A very light touch is needed; too much filing can make the points too thin and ineffective.
4. Set the Dwell (using a Dwell Meter):
* Connect the dwell meter according to its instructions. Usually, one lead goes to ground, and the other to the positive (+) side of the coil.
* Turn the ignition key to "ON" (but don't crank the engine).
* Slowly turn the distributor. The dwell meter will show a reading that changes as you rotate the distributor.
* Adjust the distributor slightly using the distributor clamp until the dwell meter shows the correct reading specified in your engine's manual. This is critical for proper ignition operation. The correct dwell will vary depending on the year, model, and even specific distributor. It is usually in the range of 28-32 degrees.
5. Check and Set the Point Gap (if a dwell meter isn't available, this is the only way, but less precise):
* With the distributor set for approximate dwell (using the above step), use the correct feeler gauge thickness to set the gap between the points (typically .016" to .020"). This measurement needs to be made while the points are just beginning to open.
* Loosen the screw that holds the moving point in place.
* Carefully adjust the gap by bending the point slightly until you achieve the correct gap (check multiple times as the slightest bend makes a difference). Bending the contact points to change the gap is common, but only bend *very slightly*.
* Tighten the screw securely.
6. Reconnect the Negative Battery Cable.
7. Verify Timing: With the points set, use a timing light to double-check your engine's timing. The timing light will allow you to observe and correct any timing issues. This needs to be set to the specifications found in your engine’s manual.
Important Considerations:
* Distributor Rotation: Turning the distributor changes both dwell and timing. You'll likely need to adjust the distributor multiple times, going back and forth between dwell and point gap until both are correct.
* Vacuum Advance: Your distributor likely has vacuum advance. Make sure it is connected and working correctly; this significantly influences engine performance.
* Centrifugal Advance: This is another component of the distributor that affects timing based on engine speed; ensure it's functioning properly.
* Electronic Ignition: If your 327 has been upgraded to an electronic ignition system (a much more reliable alternative to points), these steps are irrelevant. Electronic ignitions don't use points.
* Professional Help: If you're not comfortable performing these tasks, it's always best to seek the help of a qualified mechanic. Improperly adjusted points can damage your engine.
This is a detailed process; be patient, methodical, and always refer to a reliable source like your owner's manual or a shop manual for your specific engine's specifications. The dwell meter is crucial for accurate and reliable point setting.
