1/4 flat metal strap welded on like Jerry has shown works really well. I have over 10k miles with that same bracket with no issues. They break pretty quick without them.
Next suggestion is a bias valve in the cockpit is nice to have, but I still had to much rear bias even with it adjusted all the way down. I ended up putting the 1.38 4 piston calipers on the rear and they worked great in conjunction with the bias valve. I liked having the bias valve in reach for tuning while you are on the track. You can waste alot of session time tuning it if you put it under the hood. You have to adjust, go back out, test come in adjust ect.