Quote:

Use poly for the sway bar end links and frame bushings, and in the leaf spring front and rear bushings, rubber for the front end bushings.



I run poly rear leaf bushings. I swapped those as one singular change. I could tell the resonance and vibration in the rear went up after that. Not earth shattering, but a change.

It's just a tradeoff. As with most things there are compromises.