I have discussed the issue of suspension and chassis flex with an acknowledged expert in the field. I voiced the opinion that an improved and more supple suspension system would put less stress on the chassis and cause less deformation. He was in agreement with that statement.
I have always believed that a re-engineered Morgan chassis, something like this chassis for the TR6, would be a viable proposition.
http://www.britishv8.org/articles/fastcars-tr6-frame.htm