It's a Buick, and he's done a ****py job of setting the hitch rigging. Of course, after forty years those car springs are tired. Which is still no excuse. A set of MONROE Load Level progressive rate coils in the rear is a start.
As to unibody, all Chryslers after 1956 were such. And the preferred TV as the engines were better and by far and away the better auto transmission. Not to mention bigger brakes, better steering and a suspension a quarter century ahead of the rest. Our family, and I, towed with all of them. Took Ford and Gm more than a decade to catch up. Really, not until the late 1970s.
Unibody is structurally stronger than body on frame. Less weight, as well so it was easier to set the WD. Overhang on those old cars was the reason to avoid some brands, and luxury cars in general. A full size sedan with Taxi/Police spec pieces was the way to go. A late 1960s-early 1970s Dodge Monaco was a genuine wolf in sheeps clothing. A Dodge Police Pursuit with a luxury overlay.
I've no idea how that old man thinks that deflector is helping. That they CAN work is one thing. But not at that angle.
Thanks for the thread.