I think we're looking at a yes/no question here. Will a 15x8" wheel fit? Absolutely. A stock Demon will be able to fit 15x8 wheels in the rear.
Not Cragars...but these are 15x8,+10mm offset with the (at the time) 7.25" axle which is just a bit narrower than a stock Abody 8.75". Tires are 255/60s
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