What modifications would be involved to get a 16x7 wheel with a 215/60/16
tire to fit in the stock tire location?

This is in a (non-syncro) 84.

Is the van-cafe oversized carrier enough?
(this one:
http://www.van-cafe.com/home/van/page_348_129/oversized_spare_tire_carrier.html
)

other solutions?

To head off the questions: yes I want to have 5 identical wheels and
tires.  I like to do a 5 wheel rotation.

thanks!
Wes