Tubular rocker boxes? Anybody done this?

[bambbrose]

The Jimmy I bought had the rocker boxes cut out. The owner said "they always rust out so I just cut them out" hah!

I think some people will refer to these as the torsion boxes as well.

Anyway, I have a roll bar in the cab that I'm hoping is helping hold things together, but was wondering if anybody has built a tubular rocker box or under-tub bracing system? I would like to get rid of the roll bar long term, mostly because I don't like the aesthetics of it, but I want the tub to be less of a floppy noodle and was looking for ideas.

If there is already a thread on this please point me in the right direction!

Thanks guys