[Mike Andrew]

I just went thru a complete suspension refresh on my 80 SC. Over the past few years, I noticed a decline in ride quality and some clunks developing on our fine IL roads. I knew it was time and bit the bullet.
After discussions with the shop and research here, I selected ER "stock" rubber. Also replaced the 30K mile turbo tie rod ends, ball joints and Bilstein struts and shocks. The drive home convinced me that my choice was correct; clunks are gone ( time to chase the rattles that I can now better isolate). Handling is more precise and the ride is greatly improved.
They saved the removed parts and I examined the rubber. It was not overly/rock hard or cracked but had hardened appreciably. Of more interest was the ovality that had occurred and allowed things to move about, likely creating the clunks as things moved in ways that they shouldn't.
Had ride height set a half inch below "Euro".

Just my $.02 basedon my experience.