What problems, if any, will I run into if I were to change the rear springs to the lower spring to get the level look and get away from the "racked" look? And not change the front springs. This is assuming I can purchase just the rear set (2) of springs. I would like the level look and not hte "Racked" look. I do NOT haul very much in the trunk or back seats....so what do you think? Thanks.