I don’t have an F, but on my M, I deleted the leaf spring ISO bushings, installed 5 leaf leaf springs with poly eye and shackle bushings and the latest was added an AHB rear sway bar. Now the rear end actually feels connected to the car (something sub frame connectors will help even more). Before, it felt like driving with a small trailer whipping around trying to keep up with the rest of the car. A real wet noodle type feel.
On the other hand, as I’ve done the leaf spring ISO delete and added aluminum K-frame bushings and have really stiff shocks front and rear, I can tell you, there ain’t no cloud ride to be found; but the car handles damn well. New Borgeson steering box is next on my list.
It’s nice when you don’t have to be the car slowing everything down to make a right hand turn off the old back highway during rush hour.