depends what you want to do with it ,
you can go mad if you want but things can get expensive.
your need a body lft with the smaller suspension lifts to fit th 31s they will fit but rub off road.
www.puresuzuki.com has a lot of options you can buy there gear from specialist leisure and lasupatruxs . but t isnt cheap. calmini gear does come up on ebay,
there is lots of home building going on, so depends what skills you have
there are a couple of off the shelf live axle kits now cant think which yank company supply .
everything is available for vitaras but all comes at a price