So I just heard back from Jack at DeadNutsOn after sharing the pictures and some of my findings, he did confirm our drive shaft and slip yoke and the tube yoke are original Ford assembly line parts, so good news there.
Bob, I was really just trying to find out if my drive shaft and slip yoke I took off my K-Code automatic car was original, the car drove great with it in the car, so part of me thought maybe it had been replaced and not seeing this type of slip yoke before made me question it, so before I restored it or took it to DeadNutsOn, I wanted to make sure what I had was legit or that I didn't need to find any additional items before going through the process.
Anyway, if anyone finds this slip yoke and drive shaft on their car with these markings, it's real...
Thanks,
Jason