For years I pulled a 25 1/2 ft Dusky (about 7,000 lbs total wt) with a 2wd Dodge 1500. The only time I got into trouble was when the ramps got slick with seaweed. There were a few times when I had to use the boat engine to push the whole rig forward until the tires could get traction. A big-block Crusader can churn a whole lot of water.