George Young, director of professional scouting and assistant coach of the Miami Dolphins, was named general manager of the New York Giants last night.

Young, 48, succeeds Andy Robustelli, who resigned in December. Robustelli's title was director of operations but that was changed to general manager with the hiring of Young.

The appointment ended almost two months of internal squabbling between uncle-nephew club owners. Wellington Mara, Giants' president, and his nephew Tim Mara, the club's secretary-treasurer, disputed whether to name a general manager before a coach. Each owns 50 percent of the team.

Earlier yesterday, they met with NFL Commissioner Pete Rozelle in an effort to settle their dispute. However, the Maras said Rozelle was not instrumental in the hiring of Young.

The naming of Young settled half of the Giant conflict. The club also is seeking a coach and Young said that would be his first order of business.

Tim Mara has said George Allen is his No. 1 choice, even though he still insists a general manager be named first. Wellington has agreed to interview Allen, but those knowledgeable about the Maras' sentiments say the club president remains opposed to Allen.

Bobby Beathard, general manager of the Redskins, and Coach Don Shula of the Dolphins have been boosters of Young.

Beathard, director of player personnel for the Dolphins before joining the Redskins, said yesterday, "Young has all the qualifications to be a general manager any team would want.

"He has done everything from coach to being director of scouting to signing players. He knows the personnel in the pros and colleges."

Young, 47, currently negotiates player contracts, evaluates all NFL players for possible trades or waiver deals and scouts opponents.

He was offensive line coach of the Baltimore Colts in 1970, when they won the Super Bowl, and defensive coordinator in 1973.

In 1968, when Shula and his Colt staff were occupied with the Pro Bowl, the coach recalled asking Young to valuate collegians for the upcoming draft.

"I gave him the key to the office," Shula said at the time, "and when we got back from the Pro Bowl, he had evaluated all the players and gave us reasons to accept or reject them. He was very organized and, as it turned out, very accurate."

Despite Wellington Mara's reputed lack of enthusiasm for Allen, an NFL source at the top management level suggested that one of the Giants' two top jobs almost has to be given to a man with a glamorous name.

"I don't picture them raising an assistant coach then" the source said. "George Allen would bring instant publicity in the big city. He has taken 'down' organizations before and built them up.

"Hank Stram probably would be less willing to hand the reins over to someone else than George."