I am looking to get some new tires for the rear of my '95 3500 and I was told by a local tire dealer that I could run a 255-85r16 on the back with no rubbing. Does anybody know if this is true? I have 245-75r16 on it right now and I want to go as tall as possible because my rear gear ratio is 4. 10 and it would be nice to have a little more highway umph.