I can't begin to relate to GM bodies, so I little idea how they might or might not relate here.

But I will add "everything effects everything else" on a performance car, meaning the littlest things can change the results significantly, and why I can't participate in comparing a TB car to a coil car regarding frame stiffness concepts..

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.