To me a 345 tire out back and a 225 tire in the front is way too much stagger... I have tried almost every size front and back when I first got my car and I have run a 345 with a front tire in 225 and the car is a little scary to me.... I remember Dawg and others telling me I needed to make my rear tire smaller to help the handling of the car I was running a 335 in the back and 235 out front and now I am at 315 and 245.. yes you need to roll the fenders and open things up.. depends on how low you want to run the car I also tried every height for years.. it takes a while to figure it out... Just my thoughts on that big of a stagger Bob Benson To me a 345 tire out back and a 225 tire in the front is way too much stagger... I have tried almost every size front and back when I first got my car and I have run a 345 with a front tire in 225 and the car is a little scary to me.... I remember Dawg and others telling me I needed to make my rear tire smaller to help the handling of the car I was running a 335 in the back and 235 out front and now I am at 315 and 245.. yes you need to roll the fenders and open things up.. depends on how low you want to run the car I also tried every height for years.. it takes a while to figure it out... Just my thoughts on that big of a stagger Bob Benson