In my swap, The bellhousing sits on the crossmember. The bellhousing bolts down on 2 sides to the crossmember. The 2 bellhousing/crossmember mounts are the rear engine mounts. The adapter plate sits behind the bellhousing and crossmember. I had to make a cross member for a transmission tail support. The 4 speed sm420 I replaced just hung off the bellhousing with no other support. There was a carrier bearing and xmember that had to be removed behind the transmission.
I don't have many pics, and can't post them here. pm me with your email address, and I can send you a few pics.