This is bad info because it is factually inaccurate to use it as a universal setting for all slant 6 engines . The FACT is that there is no one universal setting for MECHANICAL timing that is ideal for all slant 6 engines or other engines for that matter unless one is referring to a newer car that is completely stock . You ALWAYS want to run as much timing as an engine can tolerate . The secret is knowing how to determine what amount of timing this is.