I've seen some Panteraa that had a tube run through the rocker panel tubs, bolted to the front inner fenders and bolted through to the main hoop at the main bulkhead.
It doesn't even need to be a round shape. I've seen it as a 2x4 shape.
If you think about it. Once it is tied to the rest of the cage, it has become a chassis.
Something to think about but where does it all stop?
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