15X8 yes with the correct backspacing.
15X3 yes with a big wheel spacer and some grinding on your caliper to make it fit.
Some people have done it but I'm not grinding on my caliper to get fats and skinnies.
JUST GET BOGARTS! www.sjmmanufacturing.com
They can get you bogarts and they require so spacers or grinding!
I will not grind these calipers either. What backspacing would I need for the rear? And if I swapped out to GT brakes up front would I still have to grind?