If you are a good fabber and welder this should be cake, otherwise don't bother. Pick up the phone call Advanced Frame Works and order up a nice new cj8 frame built to your specs.
Want TJ coils f&r, they set up the frame brackets.
Just about anything including boring old stock.

Just a thought

SD
Josh

PS remember, most CJ frames (much less coastal "rusty"ones)
are hashed to the point that major welding on them is a huge waste of time. The further you get into it the bigger the mess.