Thought i'd update this.
So this is the rear crossmember for the upper shock mounts melted in and painted. I used 1.75" with the cross pieces being 1.5" DOM to attach the brackets to.
So then i started working on the TC crossmember - i spent a bit of time trying to come up with the "best" design that would be strong, do it's intended job, clear everything that needs to be cleared and be used as a platform to tie into the rear crossmember that will need to be built to support the atlas brace (and the brackets for long arms - more on that later)
So this is the basic design, here i just have to weld on the other end...
This is the piece welded together. The cradle will obviously support the poly mount and will tuck the rear of the drivetrain about 1.5 to 2 inches higher than stock. I've chosen to use a CJ V8 poly transmision mount as it is just the right size (that will be arriving in the mail later this week) and no, i have not drilled the holes for the mount yet.