How to Narrow an 8 3/4 Rear End

Can you straighten a housing after welding on a backbrace? I'm guessing that if someone was going to narrow, back brace, and move the spring perches, the last thing that was done would be to weld the housing ends on?

Sure you can, but, if I were doing a back brace, I'd check the housing for straight, then chain it down to prevent movement. Also, I'd only do little patches and let it cool, just like Bad Sport is doing, look's great bye the way!