offset

Absolute noob when it comes to offsets and wheel size, any advice would be appreciated. Would you suggest a 25mm or 35mm offset for 19x8.5 wheels (square set up) for a stock 2012-2014 gt? And also what would you suggest if it had the brembo brakes?

I recently installed new coil overs on my 2007 Mustang GT. The install went well, and I went to get the vehicle aligned. After my alignment I noticed that the rear driver's side tire protrudes about half an inch more than the passenger's rear tire from the fender. What could be the cause of...