So yes, thanks for more details, No1300. Someone, someday may indeed do another strip-down and find (and hopefully record) those hidden numbers.
Enjoy your 3100 'inheritance'

In the meantime, I will enter this new info in my data.
Dan.. thanks for following me from the last thread to this one. Your input has been really helpful!

Leo and Mink B ..thanks for your contribution too

If I have any more questions and do run across more engine numbers I will be sure to post them here.
time to get back to the truck: never-ending home errands to run.
Wayne