It occurred to me it might be interesting to switch some--not all--of the events of the years 1968 and 1972. These can be either the same timeline, or different timelines.
What would have to happen before, and what happens in the rest of the timeline up to 2008?
The comic strip
Candorville is running a series where the events of 1968 happen in 2008, but it's just a coincidence.

The AH content is minimal; it's satire.
I used these two pages. I found some typos and probable errors...at one point a Supreme Court Justice resigns and a few days later announces his intention to resign...

but I figured it's accurate enough for most things.
http://timelines.ws/20thcent/1968.HTML
http://timelines.ws/20thcent/1972.HTML
Here are the events:
Events of 1968
Jan 25, Pres. Nixon made public, secret talks with North Vietnam, which included a cease-fire-in-place, US withdrawal, and the return of prisoners. He made a revised offer with the concurrence of South Vietnam's Pres. Thieu. Nixon aired the eight-point peace plan for Vietnam, asking for POW release in return for withdrawal.
Jan 25, Shirley Chisholm, the first African American woman elected to U.S. Congress, announced her candidacy for president as Democrat.
Feb 17, President Nixon departed on his historic 10-day trip to China.
Mar 2, Pioneer 10 was launched from Cape Kennedy. It carried a plaque designed by Carl Sagan and Frank Drake showing some details of human civilization on Earth. The craft headed to Jupiter and then continued into deep space long past expectations. In 2001 contact was re-established with the craft 7.29 billion miles distant and enroute toward the constellation Taurus.
May 2, J. Edgar Hoover, head of the FBI, died in Washington at age 73
May 13, There was a burglary at the Chilean Embassy in Washington DC. Two members of Pres. Nixon's secret White House team, known as the plumbers, were involved. Nixon later blamed the robbery on White House counsel John Dean.
May 15, Alabama's Gov. George Wallace was shot
May 22, President Nixon began a visit to the Soviet Union, the 1st for a US president, during which he and Kremlin leaders signed the SALT I arms limitation treaty.
Jun 17, President Nixon's eventual downfall began when five men were arrested for breaking into the Democratic National Committee offices at the Watergate hotel.
Oct 25, The first female FBI agents were hired.
Nov 7, President Richard Nixon was re-elected in a landslide
Nov 14, The Dow Jones Industrial Average closed above 1,000 for the first time, ending the day at 1,003.16
Nov 19, Willy Brandt's SPD won West German elections. Willy Brandt was the 1st German chancellor to seek early elections via a vote of confidence.
Nov 27, Pierre Trudeau formed his Canadian government.
1972
In 2004 Mark Kurlansky authored "1972: The Year That Rocked the World."
Jan-Dec, The year was marked by protest marches. In 1998 Tariq Ali and Susan Watkins published: "1972: Marching in the Streets."
Star Trek airs its final episode in the spring of this year. (The page where I got this timeline doesn't mention Star Trek!)
Feb 8, George Wallace of Alabama entered the presidential race.
Apr 4, Civil rights leader Martin Luther King, 39, was assassinated
May 10, Preliminary Vietnam peace talks began in Paris.
May 11, Students and police battled in Paris and 100s were injured.
May 13, Peace talks with U.S. and North Vietnam began in Paris.
May 13, A one-day general strike took place in France in support of student protesters. 1,000,000 French demonstrated against De Gaulle & Pompidou.
May 24, Pres. De Gaulle proposed a referendum and students set fire to Paris. Rioters set fire to the Paris Bourse.
May 29, UN resolved sanctions on white-minority-ruled Rhodesia.
Jun 4, Robert Kennedy won the California democratic Presidential Primary. Early the next morning Kennedy was shot and mortally wounded at the Ambassador Hotel.
Jul 1, The United States, Britain, the Soviet Union and 58 other nations signed the Nuclear Non-Proliferation Treaty.
Jul 17, The Arab Socialist Baath Party staged a bloodless coup in Iraq and gained control as the Revolution Command Council. Abdul Rahman Arif, brother of Abdul Salam Arif (d.1966), was ousted in the Baathist coup and exiled to Istanbul. Ahmed Hasan-al-Bakr became president of Iraq after the July 17 coup. This became a national holiday until it was abolished in 2003. Saddam Hussein soon became recognized as the strongman of the regime.
Aug 20, Some 650,000 Soviet Union and other Warsaw Pact troops began invading Czechoslovakia to crush the "Prague Spring" liberalization drive of Alexander Dubcek's regime.
Aug 21, After 5 years Russia once again jammed Voice of America radio.
Aug 24, France became the world's fifth thermonuclear power as it exploded a hydrogen bomb in the South Pacific.
Aug 26, The Democratic National Convention began in Chicago. Thousands of antiwar demonstrators took to Chicago's streets to protest the Vietnam War during the Democratic National Convention. Senator Abraham Ribicoff strongly criticized Chicago's Mayor Daly for his strong-arm tactics in controlling protestors at the Democratic National Convention.
Sep, The Soviet spacecraft Zond ("Probe") 5 became the first to loop around the moon and return to Earth. The L-1, given the name Zond, was a spacecraft designed to carry two cosmonauts on a single loop around the moon. The L-1 suffered repeated failure and never flew with a crew. The unmanned L-1s traveled to the moon five times under the Zond name.
Sep 5 Terror struck the Munich Olympic games in West Germany as Arab guerrillas attacked the Israeli delegation.
Sep 12, Albania withdrew from the Warsaw Pact. Albania condemned the Aug Soviet-led invasion of Czechoslovakia, subsequently Albania withdrew from the Warsaw Pact.
Oct 2, Under Pres. Gustavo Diaz Ordaz soldiers with automatic weapons killed some 300 students in the Mexico City Tlatelolco massacre prior to the start of the summer Olympics. The government said only 50 students were killed during gunfire that lasted 5 hours. Luis Echeverria, later president, was the interior minister and the man in charge of public security. He was called before a congressional committee in 1998. Evidence in 1999 confirmed that pre-positioned soldiers fired on the students.
Oct 7, The Motion Picture Association of America adopted its film-rating system (G,M,R,X), ranging from "G" for "general" audiences to "X" for adult patrons only.
Dec 21, Apollo [
insert number here] with astronauts Borman, Lovell & Anders was launched on the 1st mission to orbit the moon.
Dec 23, 82 crew members of the U.S. intelligence ship Pueblo were released by North Korea, 11 months after they had been captured.
Dec 24, The 3 Apollo [
insert number here ] astronauts (James A. Lovell, William Anders and Frank Borman), orbiting the moon, read passages from the Old Testament Book of Genesis during a Christmas Eve television broadcast. The first pictures of an Earth-rise over the Moon are seen as the crew of Apollo 8 orbits the moon.
Dec 27, Apollo [
insert number here], the 1st manned mission to the moon, and its three astronauts made a safe, nighttime splashdown in the Pacific.