Where are all these people with 240's that didnt notice anything? Other cars possibly because its not a 240 so the structure is different. On a 240sx it makes a huge difference.

Did you also happen to think that the way new cars are made now (new materials and structure design) they might not need the foam and just a few braces in key areas will suffice? But then on a cheap subcompact car (240sx) that is 10-20 years old and has 150k+ miles on them they could use it?

Anyways on topic headgasket and new uprights should be in today.