Body Bushings-Poly or Rubber ?

[71-SS350]

Thanks for the replies. Looks like the rubber bushings get the nod. Any idea where to go for best quality and cost on a bushings kit? Also, since almost 65 years young with the bad back to prove it am considering having it done at a body shop with the proper tools and guys younger than me to do it, LOL. How long does such a job take and a fair cost for such?