how ever its read. Does the gas tank stamps mean that the gas tank is original or replaced?
The point of this section, "Research Topics and Reports", is to get data from known original untampered with cars to determine if a pattern exists to understanding date codes and/or other information. If you go back a page, you will see a spread sheet where your tank date fits the collected data and can, therefore, be assumed as original to the car. New model cars generally would be introduced in September. Gearing up for production required parts made ahead of time. Your date, 10 69, or 10th week of production of model year is consistent with data. Production of gas tanks probably started in early or mid August (68) to meet demands of new model production. So say 1st week of August, count up 10 weeks, and that is when your tank was made or about a week before your car was made.