I was a little confused by the original question, so my first reply was a little off-base.

I'm still not totally sure I understand what you want to do, but I'll try again:

The way your part was defined makes it very difficult to reposition the geometry in a different orientation. It could be done with Transformations, but they only makes editing the original geometry more confusing.

I suggest adding a new Axis System at the requred point and direction. You can easily do this with the top menu bar: INSERT + AXIS SYSTEM

Let me know if I'm still not answering your question