SixStarved,
I sent a copy of your post to Scarebird and they replied:

"My brackets are made of the same thickness and material as the originals; 3/16" mild steel. When you apply the brakes, the rotor itself keeps the caliper from twisting- lot of force there, much more than the force on the bracket. My brackets are in a flat plane- so are stronger than the originals. Also, my brackets have "flats" that engage fit the caliper, just as the stock one do- the pins are there only to slide upon as the pads wear. My brackets have the following advatages:

Lighter, cheaper, components much more readily available- and you do not have to remove your drum spindle from the vehicle.

disadvantages? not stock, less clamping power, though US brakeworks sells a caliper that remedies this, and some minor machine work required.

I am working on a high performance version of this, one that uses 12" rotors and WIlwood type multi piston calipers..."