Like I said, it depends on the springs. That setup will require at least a little trimming on the front fenders. Rough Country springs are a little more firm and trimming might not be required.
I know when I looked it for my ride the back spacing should be 4.5, other wise you will rub on the turns.
With the 4" you can run 35" tires street and 33" for off road.
With the 6" you can run 37" street and 35" off road.
So if you are running it as a mall crawler then 35" will be fine for this application and you will get your studied look.
Also the springs do make a difference and you will want to go with a 35x12.50 R 15 on a 10" wide rim so you can have some wiggle room in your fender wells.
If you run a 12.50 tire on an 8" wide rim you will end up wearing out the center of your tread too early because it will bubble your tire too much. Now you can get away with it if you run the tires at a lower pressure but I wouldn't recommend this. It also can cause issues with your side walls as they will be bowing in towards the rim more than the tire was designed to do.