Mine was just a little better on the p-side,I snapped the stabalizer bars off the frame withing three weeks of owning mine.
I wouldnt drive it like that,since theres nothing keeping the back axle on the truck.A easy way to fix the far rear rust(like where a hitch would bolt to the frame,is to use 2x2 inch squire tube thats a little less then a 1/4 inch thick.As far as useing 10 gauge sheet metal,dont do it!!,use 1/4 1/5 inch even 3/16 inch stock to do the frame,that part of the frame is always being stressed and even with *fishplate* extras,I wouldnt dought that the frame will bend.
If you want to see pictures of my repair then you can check them out on facebook or I'm sure somebuddy will post theres up for you to see.