Engine and Drive train blueprints, technical drawings, CAD oh my!

If you get me the drawings, I can make the 3D models.
Makes 3D printing scale model engines and parts a cinch.
That does sound pretty cool. I could only hope to get that detailed of drawings in here.

My core goal for this is to just have a thread that serves as a repository for all of this seemingly elusive information that people have squirrelled way that might be of use to people.