PITTSBURGH — Let those other teams wear throwback uniforms. The Baltimore Ravens and Pittsburgh Steelers are throwback teams, descendants of the single-wing days of leather helmets, canvas pants and single-platoon football.

Their coaches are named John Harbaugh and Mike Tomlin, but during a different time it’s easy to picture these Ravens and Steelers being coached by George Halas or Curly Lambeau. They hit hard, play with a fury, own a yard-wide mean streak and give an inch as grudgingly as if they were giving up a first down.

In an era of spread formations, five-receiver sets, two-deep zones and a gimmick a minute from some offensive coordinators, the Ravens and Steelers win with defense and toughness. Let other teams try to outfox you — they’ll outhit you, and flash a smile while doing so.

Only last week, Steelers quarterback Ben Roethlisberger quick kicked, of all things. If that’s not something out of a Sammy Baugh playbook, what is?

The Ravens and Steelers are so alike in style, attitude and makeup that it’s difficult to tell one from the other, so perhaps it’s fitting the two rivals will play for the AFC championship tonight. If this isn’t the NFL’s version of a backyard brawl, what is?

May the nastiest team win.

“When you get two bullies going up against each other, it’s about who is the strongest bully,” Steelers linebacker James Farrior said.

The Steelers are playing their third AFC championship game in five seasons, but their first against a division opponent since meeting and beating the Houston Oilers (now the Titans) during the 1978-79 seasons.

Back then, a frustrated Houston coach Bum Phillips threatened to kick down the door and finally beat the Steelers at their own game and win a title. The Oilers couldn’t and, nearly 30 years later, another division team is trying to beat the Steelers at their own game.

“We are very similar teams,” Ravens All-Pro linebacker Ray Lewis said. “They have a lot of the same type personalities we have. You have ultimate competitors on both sides of the football. I think that’s where it kind of stirs up.”

If the Ravens’ Ed Reed isn’t the NFL’s best safety, Pittsburgh’s Troy Polamalu probably is. If Lewis isn’t the league’s nastiest player, the Steelers’ James Harrison may be. Steelers wide receiver Hines Ward was voted by fans as the most despised visiting player in Baltimore. Ravens quarterback Joe Flacco looks and plays like a slightly younger version of Pittsburgh’s Ben Roethlisberger; Flacco is going for an AFC title barely a year since playing in the Football Championship Subdivision (formerly I-AA) title game at Delaware.

Pittsburgh has the NFL’s best defense statistically in 17 years and Baltimore is second. This is the first time the league’s two top defenses are meeting in a conference championship game since Rams vs. Cowboys during the 1978 season.

The Ravens were fourth in rushing, the Steelers an unusually low 23rd, but a now-healthy Willie Parker has restored Pittsburgh’s traditionally powerful running game by gaining 262 yards in his last two games.

“I think Pittsburgh has an awesome tradition, obviously, with the Steel Curtain and everything going back,” Reed said. “And I think we have a tradition around here.”

In this rivalry, the on-field jawing is ceaseless. Early in the week, Ravens wide receiver Derrick Mason got it going early by warning the Steelers, “The Ravens are coming, so prepare yourself.”

“I don’t know if I’m supposed to be scared or laugh at that,” Ward said.

The Steelers have won three of four against the Ravens and seven of eight in Heinz Field, where Pittsburgh is 0-2 in AFC championship games. This is the Steelers’ 14th appearance in an AFC title game, tying the Raiders. They are 1-4 at home in AFC championship games over the last 29 years, losing to the Patriots at Heinz Field during the 2001 and 2004 seasons.

Both regular-season games between teams located only four hours apart were tight. The Steelers rallied for a 23-20 overtime win after trailing 13-3 at home Sept. 29, then won the rematch 13-9 in Baltimore last month.

In that Dec. 14 game, the Steelers’ fifth comeback victory this season was decided by a disputed, last-minute touchdown pass from Roethlisberger to Santonio Holmes, with referee Walt Coleman deciding upon review that Holmes inched the ball across the goal line.

“It’s always going to come down to the last drive or the last play that ultimately defines the games,” Steelers left tackle Max Starks said.

The couple of inches on that play may have meant the Steelers, not the Ravens, won the division title.

“Every blade of grass has to be defended on both sides,” Holmes said. “The offense has to gain every inch they can.”

Polamalu agreed, saying, “In other games, a 4- or 5-yard gain is nothing, like (when playing) the Indianapolis Colts. But a 5-yard gain in this game means so much.”

Since the former Browns relocated to Baltimore in 1996, never has a Ravens-Steelers game meant this much.

Asked about the supposed difficulty of beating a good team three times in a season, Tomlin said, “I personally don’t subscribe to that hocus-pocus.”

The Ravens have two other concerns: the Flacco factor and the fatigue factor.

As steady and as mostly error-free as Flacco has been, no rookie quarterback has led his team to the Super Bowl. Roethlisberger tried four years ago, but, despite the Steelers’ 16-1 record, they were thumped by the Patriots 41-27.

And due to their Hurricane Ike-shifted bye, the Ravens are playing for an 18th consecutive week, possibly with a depleted cast because of injuries to cornerback Samari Rolle (groin), linebacker Terrell Suggs (shoulder) and Mason (thigh). Rolle appears unlikely to go and Suggs didn’t practice all week.

The Ravens are trying to reach the Super Bowl as a sixth-seeded team, three years after the Steelers were the first to do so and a year after the Giants won while being seeded fifth.

“It’s kind of crazy just thinking (about) the path that this team has taken throughout the season,” safety Jim Leonhard said. “To be one win away from the Super Bowl is amazing.”

When: Today, 3:30 p.m. PST. TV: CBS

Records: Baltimore 13-5; Pittsburgh 13-4

Point spread: Steelers by 6

Hash marks: Third meeting. Steelers won first two 23-20 (OT) at Pitt, 13-9 at Baltimore. … According to the league office, NFL teams have met three times in the same season 18 times, with 11 sweeps. … Ravens safety Ed Reed on a roll with 10 INTs in past eight games. … Steelers allowed only 223 points. … Steelers’ special teams could be the difference, what with Santonio Holmes having returned a punt 67 yards for a TD vs. Chargers. … Steelers scored 347 points. Only Dolphins (345) scored fewer among eight division winners.

Ravens win if: Their defense controls the line of scrimmage and forces Ben Roethlisberger into throwing multiple interceptions. The Ravens’ D led the league with 26 INTs, four more than any other NFL team.

Steelers win if: Their pass rush, which produced 51 sacks, second in the league to Dallas’ 59, overwhelms rookie quarterback Joe Flacco and forces some poor decisions.

Ravens player on the spot: Flacco. Much has been made of his ability to avoid turnovers. But Flacco, who has thrown five INTs in his past 11 games, never has felt the kind of pressure he’ll be under today. Steelers outside linebackers James Harrison and LaMarr Woodley have combined for 27.5 sacks and Harrison has turned forcing fumbles into an art form. If Flacco coughs it up early, he could be in for a long day.

Steelers player on the spot: Willie Parker. Injuries limited him to 791 rushing yards during the season, but he showed he’s healthy last week vs. the Chargers, racking up 146 yards and two touchdowns. It doesn’t figure to be as easy vs. Baltimore’s stellar front seven.

Bet you didn’t know: The Steelers have some interesting history with the Cardinals, a team they could face in the Super Bowl. With many players off to war, the two teams merged for the 1944 NFL season, finishing 0-10. The team was known as the Card-Pitt.

Key matchup: Justin Hartwig vs. Haloti Ngata. Ngata was the Ravens’ most glaring Pro Bowl snub. At 6-foot-4 and 345 pounds, he may be the most dominant nose tackle in the league. And to think, Hartwig, the Steelers’ center, is going to have to contend with him on a gimpy knee. He tweaked it last week and played the second half in a brace.