You've got to remember as well that the majority of kits are replicas (7's, cobras) so they are working in the confines of the original design.
Back then safety wasn't a top consideration so it stands to reason that they won't stand up so well in 'some types' of accident. I always felt vulnerable from the side for instance in the cobra. Take a 7 type car and a large 4x4 and you could probably kiss goodbye to your head if they came together in a certain way
It all depends on the accident I guess as to how you would come through it.
John
Madabout-Kitcars.com