I have inherited a plumbing fixture family that is face-based, but is on the horizontal axis. This family should be wall-mounted, and I would like to add a generic annotation to it in plan that effectively conceals it on printed drawings, while maintaining the 3D representation.

Is there a way to do this? I would like to simply rotate all of the 3D geometry and preserve all of it's existing constraints with a new line as my "reference level", so that I can place a generic annotation on the "plan" view (currently the "Back" elevation of the family).