'91 Thunderbird swaying violently at all speeds

I've got a 1991 Thunderbird (3.8L V6, no supercharger),
and recently it started to sway rather violently, at first I thought it was my rear suspension (The sway seems to be caused by the front end pulling, but the front end shocks are dead anyways, figured all of them dying would cause this), but it recently became somewhat worse, and it's a little easier to tell where it's coming from, and I'm positive it's the front end.

On top of that, if I let the steering wheel go, it rotates clockwise in tandem with the swaying of the car. At highway speeds it can sway hard enough to cause my car to veer off slightly to the right. Also, it seems to calm down if I can turn the steering wheel enough for it to fully engage the pinion with the rack's teeth, and doesn't get as bad if I grip the wheel hard and hold it as steady as possible. I can also feel a sort of thunk or clank in the wheel occaisionally when it starts swaying, almost like something in the steering column engaging or clicking into place (think it's the rack and pinion, not sure). This problem seems to be caused and hieghtened by ruts or bumps on the road as well (which is what initally led me to believe it was my suspension).

Now I'm thinking it's a worn out tie rod or maybe my rack, but any advice/ideas would be absolutely wonderful!