Hi again
Thejafman,
Don't worry about that inner clutch housing, it can be replaced and the new one is a much better design.

Great news on the Model, Type and Code, I can now tell you it is a real early one for a Scotty as the Scotty 45 was first introduced in 1968. Your engine was manufactured on the 21st July 1968! Wow!
Good luck with the overhaul,