Pittsburgh Steelers wide receiver Lynn Swann jumps through the air to catch touchdown pass from quarterback Terry Bradshaw in fourth quarter of Super Bowl XIII in Miami, Fla., Sunday Jan. 21, 1979. Steelers won, 35-31. (Associated Press)

Hall of Fame Pittsburgh Steelers wide receiver Lynn Swann (88) makes a catch during a 35 to 31 Steelres win over the Dallas Cowboys in Super Bowl XIII on January 21, 1979 in the Orange Bowl in Miami, Florida. (National Football League)

Dallas Cowboys defensive end Ed "Too Tall" Jones (72) zeroes in on Pittsburgh Steelers Hall of Fame quarterback Terry Bradshaw (12) during an NFL Super Bowl XIII game in Miami on January 21, 1979. The Steelers defeated the Cowboys 35-31. (AP Photo/Vernon Biever)

Dallas Cowboys center John Fitzgerald (62) waits to snap the ball to quarterback Roger Staubach (12) during Super Bowl XIII, a 35 - 31 loss to the Pittsburgh Steelers on January 21, 1979, at the Orange Bowl in Miami, Florida. (AP Photo/Al Messerschmidt)

Pittsburgh Steelers coach Chuck Noll is carried off the field after his team defeated the Dallas Cowboys, 35-31, in Super Bowl XIII in Miami on Sunday, Jan. 21, 1979. (Associated Press)

Pittsburgh Steelers wide receiver Lynn Swann goes high to take in a pass from quarterback Terry Bradshaw, not shown, during Super Bowl XIII, Jan.22, 1979, Miami, Fla. Steelers defeated the Dallas Cowboys, 35-31. (Associated Press)

Pittsburgh Steelers quarterback Terry Bradshaw sits on the bench as the rest of his team watches the closing minutes of the XIII Super Bowl, in Miami, Fla, on January 21, 1979. The Steelers defeated the Dallas Cowboys 35-31. (AP Photp/Harry Cabluck)

Pittsburgh Steelers quarterback Terry Bradshaw goes up in the air to watch his pass during the XIII Super Bowl against the Dallas Cowboys, in Miami, Fla., on January 21, 1979. Looking on are his teammates Ray Pinney (74) and Sam Davis (57). The Steelers defeated the Dallas Cowboys 35-31 to win the title. (AP Photo/Kathy Willens)

A wide open Dallas Cowboys Jackie Smith misses a tying pass in the end zone against the Pittsburgh Steelers in the third quarter of Super Bowl XIII game in Miami, Fl., on Jan. 22, 1979. (AP Photo/Phil Sandlin)

A crowd of nearly 80,000 filled Miami's Orange Bowl for the Super Bowl XIII. The Pittsburgh Steelers defeated the Dallas Cowboys on January 21, 1979. (AP Photo/Al Messerschmidt)

Dallas Cowboys running back Preston Pearson (26) blocks Pittsburgh Steelers Hall of Fame defensive tackle "Mean" Joe Greene (75) during an NFL Super Bowl XIII game in Miami on January 21, 1979. The Steelers defeated the Cowboys 35-31. (AP Photo/Vernon Biever)

Pittsburgh Steelers Hall of Fame running back Franco Harris (32) runs upfield behind a block by tackle Ray Pinney (74) on Dallas Cowboys Hall of Fame defensive tackle Randy White (54) during Super Bowl XIII in Miami on January 21, 1979. The Steelers defeated the Cowboys 35-31 at the Orange Bowl. (AP Photo/Al Messerschmidt)

Dallas Cowboys wide receiver Tony Hill (80) celebrates as he scores on a 39-yard reception in the first quarter of an NFL Super Bowl XIII game against the Pittsburgh Steelers in Miami on January 21, 1979. The Steelers defeated the Cowboys 35-31. (AP Photo/Vernon Biever)

Dallas Cowboys linebacker D.D. Lewis makes an interception catch in a 35-31 loss to the Pittsburgh Steelers in Super Bowl XIII on January 21, 1979 at Orange Bowl. (National Football League)

Dallas fullback Robert Newhouse runs with the ball in the Cowboys 35-31 loss to the Pittsburgh Steelers in Super Bowl XIII on January 21, 1979 at Orange Bowl. (National Football League)

Dallas Cowboys tight end Jackie Smith lays in the end zone after dropping a potential touchdown pass in a 35-31 loss to the Pittsburgh Steelers in Super Bowl XIII on January 21, 1979 at Orange Bowl. (National Football League)