What is spark plug gap for 1978 Chevy 454?
The recommended spark plug gap for a 1978 Chevy 454 engine is 0.040 to 0.045 inches. However, always check your owner's manual or a reputable repair manual specific to your 1978 Chevy 454 model for the most accurate information. The gap might vary slightly depending on the specific carburetor, ignition system, and other engine modifications.