The Kansas City Chiefs will seek to snap a 50-year drought and make more history against the San Francisco 49ers in Super Bowl LIV on Sunday in Miami.The Chiefs, who lost Super Bowl I before winning Super Bowl IV, would set a new mark for the longest span between Super Bowl victories. All-world quarterback Patrick Mahomes, 24, would become the second-youngest signal-caller to win it all (Ben Roethlisberger, Super Bowl XL, then 23 years old).Likewise, Andy Reid would cast off the title of winningest NFL head coach without a Super Bowl victory. He is sixth in league history with 221 total regular-season and playoff victories, and the five coaches in front of him have combined for 23 Super Bowl or NFL championships.”Just getting him here isn’t the goal,” Chiefs tight end Travis Kelce said of his coach. “Winning this thing for him is.””He’s had an amazing career,” Mahomes added. “Obviously, we want to win this game, the big Super Bowl, put that on his resume. He’s someone who’s been successful from Day 1, and he’s still successful now.”Reid said this week he’s “very humbled” by the support from friends across the league as he leads his second team to the Super Bowl. His Philadelphia Eagles lost Super Bowl XXXIX in 2005. But those sentiments won’t exist on the opposing sideline, where the 49ers hope to make history of their own.San Francisco is seeking its first Super Bowl win in 25 years, dating to Super Bowl XXIX in 1995 that also was played in Miami.Another win would tie the Niners with the New England Patriots and Pittsburgh Steelers for the most Lombardi Trophies (six) in NFL history, and also secure the first-ever father-son combo to win Super Bowls as head coaches. San Francisco coach Kyle Shanahan’s dad, Mike Shanahan, won back-to-back titles with the Denver Broncos in 1998 and ’99.Kyle Shanahan, who was a ball boy for the 49ers in the team’s latest Super Bowl win, has been thrilled with his group’s preparation in the two weeks since an NFC Championship Game victory over the Green Bay Packers.”I wish the players could have two weeks every week to do a game plan,” he said. “I mean, for them to come out on a Wednesday … and to be firing on all cylinders, it’s not usually like that.”The 49ers roll into the Super Bowl with a dominant run game, having rushed for 471 yards while throwing just 27 times in two playoff victories. That has prompted questions about whether quarterback Jimmy Garoppolo can handle a bigger load if needed on Sunday, but his coach has plenty of faith.