Welcome, and very nice photos.
I mentioned on the other thread (before I saw this one) that I have been working for GM truck in design and vehicle assembly since 1979. My dad started with GM in 1955 and worked for 35 years as a die maker (Chevrolet Flint Manufacturing) and in Advanced Manufacturing Engineering (Chevy Central Office).
I'll probably have quite a few questions for you
My vote would be for you to start loading as much as you can into this thread, and then if the conversation starts to go off in one direction or another we could start appropriate separate threads as need be.
Again - welcome and thank you for your good work all those years.
K