Scalia, probably the most conservative, and Ginsburg, probably the most liberal, were both confirmed with 90+ votes. I know Ginsburg was with a Democratic Senate and I think Scalia was as well.
Scalia was helped by the fact that he was better than guy who was put up to a vote before him (Bork).
Scalia was helped by the Rehnuqist cofirmation for Chief, which happenned at the same time.
Burger retired, and Scalia was tapped to fill the vacancy while Rehnquist was elevated from Associate to fill the spot as Chief. Most of the fire went to Rehnquist.