The fronts are 17x9 and the rears are 17x10. Rear rubber is 315/35/17 and the fronts are 255/40/17. To get the rears to fit and not rub was tricky.
First I had to use longer ARP wheel studs. Then, a 1/2" Baer spacer. I think it's 1/2". Bilstein quad shocks because they are narrower. I have LX exhaust on the car with the Cobra rear valance. When I tell you it clears by a 1/4", it clears by a 1/4". I've had this set up for years. I love it. Car makes a little over 500hp at the crank, so I need every little bit of that 315.
All on 4-lug. That is both, impressive and scary at the same time.
A looooooooooooooooooooooooong time ago, before many of you were members here, we had a dude [Boosted87GT] (I think was his name). Making 500 crank HP back in those days was a [huge] deal.
This dude was a rich Jersey kid. Whatever "kit" he had his eyes on, would miraculously appear in his threads and images. This included a Procharger kit that most folks would have only run on a track car.
After a [ton] of warnings from some of the smartest folks on the forum at the time, he lit that bad boy up on the street, broke all the wheels studs loose, and planted that ass right on the ground.

Now, granted he had not upgraded wheel studs or anything. Your setup smacked me with a vivid Scooby-Doo flashback.

destructively. Costs too much to fix. My Foxbody slush fund dried up years ago. Lol