For the guy who's brother had a problem with passing trucks in a tour bus, I dunno....
Our 8 bag monaco is solid as a rock. Couple days ago, I had to fight a 40mph crosswind, and it sucked, but it sucked for the trucks just as bad. And I still arrived at my destination relaxed and ready for more.
Our first, a 1999 pace arrow on a v10 f53, it just wore me out. Between the noise, the leaning, and the tail wagging, after 300 miles I was just shot.
I've been told the newer ones were better, but lack this experience.
Anyway...
if your F53 doesn't have a rear track bar, it should. My understanding is they did become standard at some point, so crawl under there and look.
The rear track bar should go a long way to solving the "tail wagging the dog" syndrome.
The "cheap handling fix", if applicable, will give you the best possible results from the factoryu installed equipment, check and do it now, if applicable.