>I believe that my Land Cruiser (or any full-size Chevy SUV)
>would take out a Vanagon in a frontal or 3/4 collision.

The observation gallery needs you to define 'take out'  :-)

I think in a head-on at a decent speed, there would be much less left of
your SUV than the Vanagon, because the SUV is built to fall apart in a
crash. You would likely be safer in the SUV, but I think the Vanagon would
be in better shape.

Fortunately, head on collisions are rare, because I don't think that at
freeway speeds, it makes much difference what you are driving, you are
likely to be dead.

John