72 340 Auto 6139S Thermoquad

Could it just be the 025th day of when the model year starts and the 3 might just be the 3rd shift, assembly bench #3, or something like that? Just a thought. I have a 6139SA carb that has 165 9. I know that the 9 certainly won't correspond to a 69 model year or even a 79 model year. Just my 2 cents FWIW.

Ken