ps2cho, just read your original post again. The steering wheel wobble at speed could be the result of tires/wheels that need to be road-force balanced, or the steering damper could be shot. When was the steering damper replaced last?

Not sure about the allowable runout for a disc; however, unless you experience a vibration while braking I would conclude that the front discs are OK and not warped.

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Fred Hoelzle