Caron Carter, whose divorce from Chip Carter was final on Feb. 29, will be married in late spring to Atlanta dentist Dr. Steve Morgan.

Carter's mother, Mrs. Ben Griffin of Hawkinsville, Ga., said yesterday that she had hoped the plans could "have remained a secret a little longer.

"I'm not going to lie about it," she said. "She is getting married."

Chip and Caron Carter, married in June 1973, separated in November 1978.

In early February, the head of Chrysler Corporation's Washington office, Richard Muller, had a call from the Clerk of the House of Representatives, telling him that Speaker Tip O'Neill had decided to swap his leased Lincoln Continental for a Chrysler New Yorker.

Coincidentally, that was the same time that Muller and the Chrysler Corporation's Washington office were informed by Detroit that O'Neill's longtime friend and protege, Robert T. Griffin, was coming aboard here as a special liaison for Chrysler in sales and leasing with the federal government.

Griffin was forced to resign as deputy administration of the General Services Administration of July 27, 1978, by his boss, Solomon. The ouster provoked such an angry reaction from O'Neill that President Carter moved Griffin into a $50,000-a-year job at the White House.

Griffin resigned his White House post at the end of January "to take a position in the private sector."

At Chrysler, his new $65,000-a-year job deals primarily with GSA and the Defense Department.

A spokesman for the Clerk's Office at the House said yesterday O'Neill originally had wanted all the Democratic leadership to switch to Chryslers this year.

Ben Guthrie, formerly assistant clerk and now the newly-named sergeant-at-arms, said that he had informed both Majority Leader Jim Wright and Minority Leader John Rhodes of the Speaker's wishes and presented them with a "package."

But Wright already had decided on an Oldsmobile diesel and Rhodes wanted a Lincoln Continental, Gutherie said.

Memo from Nick Rizzo, deputy finance chairman of the Carter-Mondale Committee, to reelection chairman Bob Strauss:

"While the eyes of the nation were riveted on the state of New Hampshire on Feb. 26, 1980, the Carter-Mondale Finance Committee silently entered the state of Massachusetts with HUD Secretary Moon Landrieu and left the same day with $80,000 of Massachusetts money for the Carter-Mondale Committee."

Reply from Strauss to Rizzo:

"The last time I saw a note like this was when Dillinger slipped into Peoria and, in the dead of night, took $80,000 from the First State Bank."

Item:

Carter-Mondale strategist Tim Kraft stepped off the dais at a recent Washington fund-raiser with an unidentified man and was stopped in his tracks by Esther Coopersmith, who has been finding contributors for presidential candidates since Estes Kefauver was running and has raised $8 million for the Democratic National Committee.

Coopersmith was unhappy because Rizzo was threatening to replace a friend of hers, Brude Sundlund, as finance chairman in Rhode Island for not meeting his quota fast enough.

"Don't you let him do that to Bruce," Coopersmith told Kraft. "Rizzo is a NOTHING . . . a NOBODY . . . no one even knows who he is!"

"In that case," replied Kraft, turning to the man accompanying him. "Let me introduce you . . ."

Item:

Sen. Paul Tsongas (D-Mass.) was eating at the Monacle Restaurant with Nick Rizzo, who raised $1 million in seven months for Tsongas's election to the Senate in 1978.

They were interrupted by someone who wanted to complain to Tsongas: "You've got a guy . . . Rizzo . . . working for you who is the biggest phony in the world . . .'

"You don't know him?" responded Tsongas. "Meet Nick Rizzo!"

Who is Nick Rizzo and why does he delight in repeating all the terrible things people are saying about him?

Rizzo, who is in the auto-parts business outside Boston, is the man who sent "Miss Lillian" Carter out to Las Vegas and raised $100,000 in one night. That's the evening she showed up ringside on Frank Sinatra's television special and viewers all over the country were wondering what she was doing there, applauding a supporter of Ronald Reagan's.

Rizzo says he is the man who discovered that Vince Marotta, the inventor of "Mr. Coffee," who had never been involved in fund-raising before, could raise $130,000 in one night at his Shaker Heights home outside Cleveland.

Despite Rizzo's successes, it is his feud with Sundlund over the Rhode Island finance chairmanship that has put his name into circulation around Washington.

Rizzo calls the handsome, dapper very social Sundlund, president of the Outlet Retailing & Broadcasting Co., "The Great Gatsby."

Sundlund can smile because he is still finance chairman in Rhode Island, despite Rizzo's maneuvers to name staterepresentative Edward L. Maggiacomo in Sundlund's place.

When that failed, Maggiacomo was named co-chairman, then reduced to vice chairman.