* Distributor Variation: HEI distributors can have different internal configurations, even on the same engine year and model.
* Engine Modifications: Someone might have modified the distributor or the engine wiring, making the standard firing order irrelevant.
To find the correct plug wire positions, you need to:
1. Identify Your Distributor: Look at the markings on the distributor cap or body. Some distributors have markings that directly indicate the firing order.
2. Consult a Service Manual: A service manual for your specific 1979 model and engine will provide the correct firing order for the engine and the distributor.
3. Use a Timing Light: You can use a timing light to trace the firing order. Connect the timing light to a spark plug wire and observe which cylinder fires when the engine is running. Repeat this for each cylinder.
Typical Firing Order for a 350 CID Chevy Engine (Small Block):
The standard firing order for most 350 CID Chevy engines is:
* 1-8-4-3-6-5-7-2
However, it's important to note that the exact firing order may vary depending on the distributor configuration, so you'll need to confirm the information with your specific service manual.
Important Notes:
* Safety First: Disconnect the battery before working on your electrical system.
* Professional Help: If you are unsure about any aspect of this process, it's always best to consult with a qualified mechanic.
