10" Drum Brake Hard Line Challenge

Is this bracket correct for 10" brakes?View attachment 1716236663

Out of curiosity, why buy 9" brake parts if you have 10 " brakes?

Are the 10" brakes what came in the car originally or were they swapped in at some point?
Great question about the bracket. I don’t know and can’t find a clear answer online.

I am told the car came with 10” drums but I don’t know the history of what may have been changed. Had brake problems when I purchased a and wound up having to cut one of the hard lines to get the cylinder off that had gone bad.