Yes I here you about the rear wheel steering. When it does it it does kind of feel like its steering in the rear. The thing is though that the rear set up is the better part of 10 years old and its never done this before. That's why I'm looking for recent mods and events.
My 4 link is a much greater angle then the stocks. I would say close to 45*. I also replaced all the bushings in the traingular bars. Not the straight bars yet though.
I do think your on to something though with the rear end steering cause when I replaced the bushings I noticed the holes on the arm mounts were a little ovaled. Did some little burn outs on the 4th of july while dragging the rear. I can imagine this put a lot of stress on the holes the bolts go through as the right side of the axle tried to go forward and the left wanted to go back or stay in place. Sounds good anyway
I have to pull one of these off soon to reinforce a crack so I'll look more into it. I hope this is it. It would be a paint to re do the whole rear but at least it would be solved!