I ended up changing my mind about my hackjob crossmember I made and figured I would purchase a Holley crossmember and hack it up instead. I found a post on ls1tech where a guy used a T56 crossmember to install his 6l90 so I figure this would be a good starting point.
Sorry for the lack of photos, I away from the car but I'll get photos of the crossmember installed later on.
Here are a few pics of what needed to be done on order to make it fit. I had to cut out some of the diagonal gussets to clear the pan and then I had to lift the mounting position roughly 2" high and 3/4" forward to bold up to my trans witht he trans sitting at 3 degrees. Also reinstalled the diagonal gusset plate off to the side to maybe help keep strength.
It ended up working out great and is way stronger than my hackjob crossmember. I did not want to risk hitting a big bump and the stock crossmember bend and screw things up so this should help that not happen.
In order to lift the mounting point and move it forward I just used some leftover Ridtech axle tube tabs from my 4-link kit and the plate with the mounting holes came with the crossmember, I guess it might be a spacer?