Hot Rod chassis stiffness?

[RoadRacer]

Has anyone ever heard numbers of torsional rigidity of the Hot Rod chassis? Or any FFR chassis?

Just curious how stiff a spaceframe like this is, compared to a monocoque or production car/super car. Some of those have published numbers.

[Mastertech5]

From what I've heard very stiff. Lots of triangles which are one of the most rigid shapes used in a wide variety of consruction.