I don't have pics on this computer ( lap top & on the road ) , but I used 2X3" tubing.
Tied it to the torsion bar cross member with plates , went through the floor in the back seat and tied it into the front of the rear sub frame at the back.
So they are welded to the floor pan where they go through the floor behind the front seats and I opened the front of the sub frame and tied them in using the metal where I cut in as a tab on the bottom side and on three sides of each frame rail for the sides and top.
I could have drilled 3/4 " holes on the sides of the frame rails too and welded there , but I think I got it pretty secure.
Try the search and I bet you find a couple different ways to do this with pics.
I'll see what I have for images when I get home if you haven't found anything by then.