does anyone know for rear how much the rear track of boxer is incresed when the rear wheels are changed from 7" to 9". i have the information from the workshop manual so to quote me this is not realy of any help. im fitting a 512 rear clip to a 365 and from the side of the car you cant even see the wheels. if the fitting of wheels 2" wider will make the total outer rim to rim mesurement 4" that would be fine, if its 2" that might not be so good. any thoughts let me know.