WHOA!!!!

Don't put passenger tires on a van.  You are asking for a blowout, or a rim
separation (air-out), or at worst a sloppy ride.  That reinforced sidewall is
called for for a reason.  My van came with passenger tires when I bought it,
and it got great "mileage", but it was totally sloppy on the road. Any wind
or gust or passing truck would throw it around.  I thought it was a 'van
thing' until I got the right tires.  No slop, better in winds, lower and more
accurate mileage.  The van calls for a reinforced tire -- do it!!  I cannot
stress the importance of this enough.  This van is not a cadillac -- it is
relatively smooth, but not great.  You need the stiffness to get around.
Safety is the issue.  If you are presented with an emergency situation, do
you want to safely maneuver or have your tires fall off the rims?
     PS:  I'm not even pushing a wolfie or a camper.

Bill Marshall
85 GL Tiico w/snappy handling
Phoenix AZ