I have a 2001 Ford Explorer with a 5.0L V-8 engine, that I use to tow a 21ft. Skeeter Bay Pro. The trailor has surge brakes that work well. I weighted the boat on a truck scale when it was fully loaded with gear and fuel, it weighted 4,500 lbs. (dry wieght is 1800 lbs.) The V-8 Explorer is...