Wheels-Tires Will This Wheel/tire Setup Work?

Hi! I'v searched around for a little bit but have yet to find an answer so I think maybe I should just start one of these. I'm still fairly new to the Mustang scene and I was just wondering if this wheel setup would work:

Front: 18x8.5(+25) with 235/35
Rear: 18x10(+25) with 265/45

I don't really know much about sidewall sizes so any info would be great. I also plan on lowering the car enough to fill up any gap. Thank you! Also, the wheels are XXR 521's in case that makes any difference.
 
You might be better off just purchasing a set of wheels from a Mustang place like American Muscle. They tell you that it will fit your make/year/model. They will even mount/balance the tires and ship everything for free. I run 18x9 for the front, 18x10 in the rear. The rear still had that tucked in look a little... so I purchased a set of wheel spacers from them to bring it out flush with the fend to give it a good stance.