Can I cut here? (QA1 upper control arm issue)

I just don't like hackin on the car unless I have to. I know, what he removed is probably miniscule.....never be missed. I would have marked the control arm, removed it, cut a "window" out of that front arm above where that bracket was it was hitting, flipped the "window" around backwards and welded it back in. That would make the control arm convex in that one area and would have cleared the bracket. Again, a LOT more in depth than cutting a small part off, but it would have worked and not compromised the integrity of that control arm.

Reducing the cross sectional area of the control arm that close to the mount by doing what you suggest would absolutely reduce the strength and integrity of the UCA.

That’s EXACTLY why I wouldn’t suggest modifications to the UCA. That’s not the place for shade tree fixes.