I had to remove the transmission crossmember to accommodate the 700R4. Then I remembered I still needed it for the parking brake cables. So the left side was cut off and reinstalled for the cables.
So I just used the torsion crossmember. I cut the pieces to fit, and obviously had to account for the drop to the transmission mount.
No rocket science here.
I used the existing holes in the crossmember for the mount. There are no sleeves in the crossmember, so over tightening will crush it.
Fortunately, the trans mount doesn't see a lot of weight or torque, so there's no real reason to over engineer.