Has the ride height been changed from original? If the drag link from the steering gear to the left front wheel isn't parallel to the ground, there's nothing that can be adjusted to eliminate bump steer. A stabilizer won't help much in that situation. It's a geometry problem that will only get worse as the angle of the drag link off horizontal increases.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!