Thanks for your help.
I want to do this the quickest way possible and the method that you used with tubing and angle iron at the door jams at the makes sense to me.
I could weld a strip on the ouitside curved side of the door jams to make it stiffer like a channel.
The piece that wraps around the front of the rear wheel well is the one that seems most difficult because it is a tight curve around the wheel well and a second, gentler, curve on the outside edge.
Can tubing be bent in that tight of a curve or is there a different approach for that section?