Here's the basic idea of where I'm going with this. The idea anyway, pending actual test fitting, etc.
The middle section in tan would be a fabricated piece wrapping the frame with the body mount and link mounts built onto it. The inside of the frame rail will be reinforced. The rear upper links would be incorporated into a new cross member with a driveshaft hoop and tie into the fabbed frame section that I'm calling a cradle for now.
Triangulated rear 4 link. Parallel front 4 link with a track bar.
Lots to still figure out.