Thanks,

"or are you making an animation and literally want 3D representations of dimension lines?"

YES

I want to add the lines to a 3D Box with a texture so I can rotate it and have the lines move to the new position and show up
when it is rendered.

Looks like the only way would be to create and add the dimension lines as an object in the scene ?

Right ?

I'm real new to maya and know little about it's features.

Thank you very much for your help,