Just share the experience with mustang svt rims I bought wks ago. I was looking for a set of used 17" rims for my RE11. I searched in Craig, ebay and googled for local sale. it's so hard to find used rims have more than 8.5" wide. My idea rim is 17x9 with et 15 to 35, so it can fit the tire from 245 to 265.

Finally, I found these 17x9, et 26, center bore 70.7 (7mm bigger than Z) svt wheels from Crag. Perfectly fit, but from looking standpoint, 265/45 all around with 10mm spacer at the rear might be the best setup.

The car was jacked in the pic. to run 245/45 at the rear, there is a huge gap (3"+?) w/o lowerd. but not a big deal to run autoX. Havent had pic for both F & R wheels on the car. if someone needs, I can take one.

 

I run FR500's that are 18's but don't require any spacers for a great fitment. I think they're 18x9 up front and 18x10.5 in the rear. I run a 305 on the back wheels. Mine are authentic FR500's, but you can find replicas for pretty cheap. Just an option you could look into.

 

17x9 look into 275/40-17 front and rear

 

I bought the tires ahead of time. tire rack had a nice deal on 245/45-17. want to feel the thinner tires anyway, will go for 265 square after that.

 

I would like to see a pic of the entire setup when you get a chance

Wouldn't be my first choice but if it's for AutoX they should be fine