A:
If you have a face that varies in its reveal I would use some long length "red head" brand concrete anchors. They are a expansion anchor vs. a screw. You can use the same diameter anchor, but you may have to play around with a couple of different lengths to even the bar out. Also, it wouldnt be a bad idea to pack out the areas that have more slack/depth to them. It will give them bolts more to tighten against.
Hope you project goes well!