Let's talk backspacing

Brian,
Perhaps, but I don't have the A-body rear, stock or otherwise, it is a longer one from a B-body. 4-1/2" backspacing would only be 3/4" inboard more than what it is now. That would barely clear the wheel well lip - the tire is currently lined up right under the lip. That's why I was suggesting to move it 1-3/4".