Rear end width?

[FONT=&quot]I have a B-body 8 ¾ rear with 11 x 3” brakes. I’m going to have it narrowed to stock A-body size. Do I need to make the housing and axles narrower to fit the 3” brakes? Stock A-body 8 ¾ came with 1 ¾“ brakes. It seems like I would want to narrow 1 ¼ “ on each side more than stock A-body for the wider brakes. Or am I missing something? Thanks.[/FONT]