I got a Ford Probe for almost nothing, and the upper strut bushing was shot. It would pull towards that side hardcore, even with the alignment perfect. I can't recall if it made it harder to turn though.
If the car was in a wreck, it could be something broke/bent in the strut assembly, or the rack could be bent. Its most likely in the strut, since it works fine with no weight on the strut. To check it out, I'd suggest you put it on jack stands, then have someone move the wheel back & forth as you slowly jack one LCA up. Then do the same wiht the other side. BTW unhook one side of the swaw bar when you try that, otherwise it won't compress the strut as far.