I am thinking of purchasing a used truck. A 1988 ford f150 with a 5.0 liter v8 but am not sure what the GVWR are on this model. My trailer is a gooseneck and weighs about 5000 lbs. Will this truck be adequate or do I need a larger one? I was pulling this trailer with a 2000 dodge quad cab 4x4 with the smaller v8