However, a common and generally accepted range is 0.035" to 0.045". This is a good starting point.
To find the *precise* gap recommended for your specific Chevy 350:
1. Check your owner's manual: This is the best source of information. The manual will specify the recommended gap for the engine's original specifications.
2. Consult your spark plug's packaging: The box the spark plugs came in will list the recommended gap.
3. Check a reputable repair manual: Chilton's or Haynes repair manuals for your specific year and model Chevy 350 will provide this information.
Important Considerations:
* Ignition System: Different ignition systems (e.g., points, electronic ignition, HEI) might require slightly different gaps. Higher-energy ignition systems might tolerate a slightly larger gap.
* Spark Plug Type: The type of spark plug (heat range, material) also influences the ideal gap.
If you're unsure, starting within the 0.035" to 0.045" range and then adjusting based on performance or using a gap tool to match the plug's packaging is the safest approach. Incorrect gap can lead to poor performance, misfires, or engine damage.
