i have a chance to get a good used set of 33x12.50-15 for real cheap or i think he might give them to me he said they only have 1000 miles on them but will they fit factory ford rims? i have 31x10.50-15 on them now also will they fix my truck at stock height or will i have to lift it my truck is a 1995 ford f150 4x4 1/2 ton