Thanks!
Couple updates. I'm slacking a little. I've been trying to work on this a few hours at night and on weekends, but after working in the shop 10 hours during the day, with the temperature at 100 degrees with ridiculous humidity, I'm about done at the days end.
Got the down bars cut off and prepped for what Ron suggested, a Ness bar. The down bars need to connect to the new rear frame rails, problem was, my new rails are about 10" narrower than my existing down bars. Cutting mine out and installing new ones really wasn't an option. These were welded to the main hoop when the cage was dropped so the tops could be welded. Now that the cage is lifted into position and welded in place, you can't get to the tops of the existing down bars to cut, or be able to weld in new ones. Ron came up with a wrap around bar, or Ness bar. This allows the down bars to be further out, and to be honest, frees up some real estate to put additional items back there.
The Ness bar will make an excellent place to attach the cover for the rear seat area. This all becomes home to the rear end accel/decel links, oil tank, battery, etc.