* Year of manufacture: Specifications changed slightly over the years the 302 was produced.
* Engine modifications: Aftermarket parts, tuning, and modifications will significantly alter the idle.
* Automatic vs. Manual Transmission: The idle speed might be slightly different depending on the transmission type.
* Condition of the engine: Worn components can affect idle.
However, a generally accepted range for a stock, properly functioning Ford 302 would be between 600 and 800 RPM. This is just a guideline, and you should consult your owner's manual or a Ford service manual specific to the year and model of your vehicle for the most accurate idle speed specification.
