Take a look at your tire height compared to stock. It looks fairly close. Stock rims were 14x7 with near zero offset, so with the wider tires I can't see why you would need to move that rim in two inches to compensate. People running 4.75 backspace are running 8" rims, so you can adjust that down for a 7" rim. An 8" rim in the back is no issue, I think I ran a 4.5" back space with 225s with tons of room.