The spark plug gap for a 1965 Ford Mustang depends on the engine it has. Ford used several different engines in the '65 Mustang. You
must consult your owner's manual or a reliable repair manual specific to your Mustang's engine (e.g., 6-cylinder, 260 V8, 289 V8, etc.) to find the correct gap.
There's no single answer to this question. The gap is critical for proper engine performance and can damage components if incorrect. Don't guess – check your documentation.
