what size tire are you going to put on it? that will make the biggest fitament difference that wide a rim will probably not work with your factory tire, its just too wide. i would say at minimum you would need to go to a 255/55/18 if you want to stick close to factory

from a different thread....

factory wheels are as follows
178mm wide. 127mm from inner lip to hub (protrusion into the wheel well) 51mm to outer lip of wheel

on your 9 inch wheel it will go...

0 offset - 114mm inner lip to hub... 114mm hub to outer lip

+12 offset - 126mm inner lip to hub.. 102mm hub to outer lip

+25 offset - 139mm inner lip to hub.. 89mm hub to outer lip

+30 offset - 144mm inner lip to hub.. 84mm hub to outer lip


your 5" backspacing is equal to the +12 offset... basically the wheel is going to stick out past the factory wheels by 1.5-2"

if you go larger than stock with your tires, expect a good bit of trimming of the front and back of the front fenders.

as far as balancing concerns, they are going to take more weight to balance, and some older balancers may have trouble with them, id suggest a place that does road force balancing to get the smoothest ride out of the new setup

lastly, check out rickshaw's gallery, he is running 18x9 KMC wheels with a 5.71 backspacing, and they fit very well under his lifted VX with larger than stock tires