Precise timing specifications (degrees BTDC - Before Top Dead Center) aren't readily available without consulting a specific repair manual for that year and engine. These specifications vary slightly depending on the specific engine's calibration and may even be found imprinted on a sticker under the hood. Your best bet for precise timing is to refer to a Ford factory service manual for your exact year and model. These manuals provide detailed diagrams and specifications. A Haynes or Chilton manual might also be helpful but might not have all the specifics of a factory manual.
