I'm stupid enough to want to remove my load bars.

I have a Thule rack that I took off of my Mazda (no longer with us) that I'd like to put on my Impreza. All that I need are the Thule feet and the Subaru load bars OFF my Impreza's factory rack. Any idea on how to do that?

I have a Thule on my 98 OBS, I don't 100% remember, but I think I drilled the rivits off of the rails. I remember that they were well siezed.