So, I'm trying to determine my best option. I have a '16 CC Z71, front measurement 36.3 and rear 39.6. I'm looking to replace the stock tires with something a little more aggressive and am looking to go with a 275/60/20 with the stock wheels. In your opinions, is it possible to go with the front 5100's on the third setting, potentially raising the front end to around 37.5 and is it possible/advisable to pull the rear blocks and go with the rear 5100's on stock setting, leaving the rear to be sitting roughly at 38.4, leaving a little bit of rake? Also, if this is something that is advisable, will 275/60 wheels fit without rubbing? Thanks all.