Straightening a 8.75 rear end

3402 said
I'd guess the bend starts at the mount (the one leaking oil) In the past when changing rod ends, the bolts would slide in, this last time, it took some preload to get the holes to line up. What kind of brace would I use to help with this problem? Also the coilover mounts are welded to the back of the housing. Thanks.

Most cases with the link attachments that is where they bend and it needs to be straightened there out
I have all kinds of different pieces to hold housings in different spots to straighten them where the bend has initially started.
Once it's straight then you can have a brace put across the housings and then redo any shock mounts.

Any housing can be done, its all on the shop and there ability.

DC 340 said
I had my 8-3/4 housing straightened via hydraulic press by a guy in PA and ultimately the housing ends welded on center by Moser when I had it narrowed. The pictures show the rear end with back brace and installed jig (I now own that jig) which shows the orientation of housing ends to the 3rd member axle centerline. They can definitely be straightened:

Thats still off as you can see in the picture. The problem you have with using that tube as jig and not a specific solid bar is that the tube will also move with heat like the tubes in axle housings move.
If you look at your pics the one side needs to go forward and up slightly and the other side needs to go forward and down, if the tube inside is still truly perfect.

The tube will move, i deal with tubes and heat all day it doesn't take much heat to get them to start moving.