Dennis, the poly bushings are too firm for the stock arms and there have been several cases of the arm breaking due to lack of movement. Those arms have to move up and down with your suspension so for your car I would stick with rubber. I'm looking in to the adjustable ones just for better alignment issues, but my car has been lowered so it causes more issues when it comes to alignment.
I think there is a good web site with info on the ploy vs rubber I think it is car daze.com. Check that out.
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