I think the instructions call for you to crimp some threads on the old gas carb idle screw. I like that idea, so i just adjusted it to where I needed with blue locktite.
As for my bracket, I just used some 1"x1/8" flat bar. Also, if I remember correctly, I wound up not even drilling new holes, I drilled the holes in my bracket to match some holes that were already there and left over from where I removed some emissions crap.