I run a set of 33x14.50x15 SSR's on 15x10 wheels with 4" of backspacing and only just barely rub my front lower control arm at full turn and full flex. I consider it a "non-issue" as it just puts a small rub spot on the paint and doesn't even rub the paint off. A few thousand miles more on the tires and they won't reach.
A quote from my wife: "I don't even want to know how much it cost, I'm not in the mood to be that pissed off today."
you will need spacers with the factory wheels. Your tires will probably rub the spring perches in the rear, aside from the front tires rubbing on the control arms and loss of overall turning radius
$200 for wheel spacers or $300 for a set of 5 steel wheels with proper backspacing
In the past, I've had 35x13.5 MT baja claws (they only measured out to be a bit over 33") with 15x8 wheels that had 4" backspacing and I had to adjust the steering stops with 2 washers on each side. I currently have 33x12.5 swampers with 15x8 wheels with 4.5" backspacing and needed 2 washers on each side too.
They'll fit on 15x8 with 4" backspacing as I've done it before, but most will recommend that you use a 10" wide rim. You'll just need to play around with the tire pressure until you figure out what will give you the flattest tire patch.
You'll also want to add washers to your steering stops to prevent rubbing the front control arms.