I've had the bracket out several times. Its stamped sheet metal. I've realigned it to strike on the center of the pedal arm, made sure it is flat (not the key slot), lubed the pivot (even thought it might be oblong), made sure the shoulder bolt isn't too tight, adjusted shoes/ lubed backing plate, etc. You can see the bracket flexing. Plan is to take some extruded aluminum angle stock and make a new bracket. Probably will do it when I upgrade to discs.
Above I mentioned being careful about a return spring and or pulling up on the pedal due to the grommet holding on the push rod. Yes, i know this is the wrong fix but many do it anyways.
Another thing to remember is what is holding the piston in the master cylinder. Many people have have installed the master with only that tear drop tab that ships with a replacement master. Doesn't take much force pulling back the pedal to bend that tab and then the piston pops out. There should be a plate with a boss for a dust boot to retain the piston.
