I bought a brake pedal and bracket to fit a standard booster off ebay a while ago. The Camaro frame was in the way of bolting it in as it should, so I trimmed it till it would fit and then set about strengthening it again. I cut a piece of angle to fit and then welded it in place.
I don’t intend running a booster, so I drilled the bracket to fit a Wilwood manual master while I was at it. Not sure about how I’ll fix it to the frame yet as the bottom mount is covered by the Camaro frame. Maybe a long bolt, or just weld it in and call it a day.