replacement suspension bushing advice - poly vs rubber

72' pretty much covered it. Stock rubber deflects in a certain range of motion, that's why it is important to keep it all loose and torque it all together at ride height. Poly pivots, and you should torque it too at ride height but that depends on the bushing set up. Lube is your friend with Poly.

I used Polyurethane cab bushings on my 79' Ford 150 SWB 4x4 and they are fine. They won't flex as much as rubber but I didn't notice any extra NVH over other trucks I've ridden in with rubber mounts. I have a built 460 sitting on Poly mounts too.