any tips or tricks to fitting something bigger than a 245 rear tire without it rubbing. i have rolled the lip in the back but it rubs up in the fenderwell. i have 235's on my valiant now and they rub when i take a hard turn and i have to keep the back jacked up to keep them from rubbing. im not looking to tub it out but i would like to be able to fit at least a 255. fwiw im running 15x7 cop car rims.