have an 8 3/4 a body diff with 3.91 posi. have a body axles redrilled to 5x4.5 with green bearings. i have 11 inch backing plactes off another diff. will 11'' brakes work or is the a body axle offset too different? do i need new axles or should i use the stock smaller dart rear drums as i am upgrading to large front discs? 2 or 2.5 inch drums and pads? i will be running about a 500hp 440 and worry the stock axles won't take too much stress. a lot of questions, i know. but all info is greatly appreciated. thanks to all. p.s. running out of credit card limit. on a budget.