finally scored a pinfall victory over Graham and won the title, despite Graham's leg being on the rope during the pinfall. Backlund's early challengers for the title included Spiros Arion, Mr. Fuji, Ivan Koloff, George "the Animal" Steele, and Ken Patera, and had his first high-profile title match in Japan, defending against Antonio Inoki. He also won a series of rematches against Graham, including an April 1978 steel cage match at Madison Square Garden. Three days after winning the WWWF Heavyweight Championship, Backlund clashed with the NWA World Heavyweight champion Harley Race in a rare "WWWF vs. NWA" title match. Both titles were on the line, but neither changed hands as the two fought to a 60-minute time limit draw. Defending against other champions became a recurring theme in Backlund's run with the title. He faced the AWA World Heavyweight champion (Nick Bockwinkel) and two NWA World Heavyweight champions (Harley Race four times and Ric Flair once) He defeated the NWA Florida Heavyweight champion Don Muraco. In 1982, he battled "international champion" Billy Robinson to a 63-minute curfew draw in Montreal. Early in his run, Backlund and Peter Maivia formed a successful tag team and challenged for the WWWF World Tag Team Championship, held by the Yukon Lumberjacks. During a television taping in October 1978, Maivia turned on Backlund and attacked him and Skaaland. In the immediate aftermath, fans for the first time got to see another side of Backlund's personality: that of a raving, ranting maniac when angered or pushed hard enough; in the post-match interview, Backlund screamed to interviewer Vince McMahon that he was going to "kill that son of a bitch!" Backlund eventually won a series of matches against Maivia, including a steel cage match in January 1979 at Madison Square Garden, although he was not able to fulfill his threat to end the life of Maivia. In 1979, the World Wide Wrestling Federation (WWWF) became the World Wrestling Federation (WWF). On November 30, 1979, NWF Heavyweight champion Antonio Inoki defeated Backlund in Tokushima, Japan to win the WWF title. Backlund then won a rematch on December 6. However, WWF president Hisashi Shinma declared the re-match a no contest due to interference from Tiger Jeet Singh, and Inoki remained champion. Inoki refused the title on the same day, and it was declared vacant. Backlund later defeated Bobby Duncum in a Texas death match to regain the title