I have the same problem with one of my cars, and noticed that one of the front wheels is lower than the other.
I took the suspension out, (springs and/or sway-bar) and let the car sit down as low as it can go, and noticed that one of the white steering knuckles was not sticking up (with the body off) as high as the other. Also I could lightly push down on one front corner, and the opposite rear wheel would rise off the ground, but pushing down on the other front corner, even a little harder, would not lift the opposite rear wheel.
I could look across the bottom of the chassis and see that one front wheel was at a different height than the other. (NO suspension) I took the white steering knuckles out to compare them, and it's very hard to see, but there is a difference.
I mounted the "bad" steering knuckles in my Turbo bit, which drives great, and it started exhibiting the same results. (pulls to the right/spins to the right easily)
Mine is a Pennzoil SE Skyline with the black wheels.
Now if I could just find someone who sold the steering knuckles...preferably with black wheels...
