That should be adequate for pulling a boat to the lake! But I would imagine a 7000 pound 4x4 truck with a Boss 540, even without turbos, means that you shouldn`t be expecting any Christmas cards from Al Gore, Greta, or the Sierra Club. As for the truck, I have seen that style of truck reffered to as a "OBS", what does that stand for? As a former owner of "Bump Sides, and Dent Sides", and currently a Super Duty, the OBS designation is unknown to me.