[BruceLambo]

I still believe that the chassis only needs to be strong enough torsionally to resist the maximum load from the wheel, generally in bounce. The second thing to that is the torque from a front engine/rear drive car that wants to twist the vehicle as well. (but most of us here have midmount engines anyway).
As the Ultima and Lotus Elan for want of perhaps other examples, are touted as being very good handling cars, why then would you need to double the torsional strength of their chassis?
So why then if the maximum loading into a shock mount does not twist a chassis even by 0.5 of a degree, why would you want to double or triple its strength? Seems a waste of material, engineering and weight penalties.
But are you going to really notice 1 degree of chassis twist on the limit? After all, your wheel rims, tyres, suspension arms and bushes all have flex and play, so you could then argue that all your suspension setup is really just a good compromise.