I saw the Sir Vival car back in the 80's in the lot of an auto-body shop in Bellingham MA. I thought it was a joke... to show off the skills of the people who worked there. But it was a serious real effort to make a safety car... not one created for the National Lampoon.
The shop has since moved but it's still there... only now indoors.
It made the cover of Mechanix Illustrated and here's the article