Was the Eibach bar put on the front?
If "Yes", did it have washers/collars welded on to fit against the bushings?
If "No", your problem is probably that the sway bar has shifted and is hitting the frame.
This was a common problem with the early Eibach front sway bar. Later models had a washer/collar welded on to prevent this.
I used some rubber pipe connectors and hose clamps to keep mine from shifting.
Eibach made some poly clamps to do the same job but they did not work as well as my "ghetto" fix.