I have looked at them and like your shop, I feel the same. The only way I see they might help is to have all four of your Leaf Spring Shackle Bushing worn out. They can be replaced for around $10 each. A far cry from the $500 for the rod. I could have misread what they do. I have replace my bushing some years back and did notice maybe a slight improvement. I just install some front and rear airbags and adjust the front end and air pressure and it did the trick for me on a 99 F53. Tracks and very little wind tail movement. Good luck