Spahits ran for 43 yards and three touchdowns on seven carries while backfield mate Jarrett McClenton picked up 145 yards and a TD on 12 rushes.
"I really think the lines were the equalizer in the game," offensive lineman Deion Oliver said.
Archbishop Wood (11-2), the Inquirer's second-ranked team in Southeastern Pennsylvania, dominated the line of scrimmage with its defense as well. The Vikings shut down Jerry Lanier, the second-leading rusher in the area, and the Academy Park offense for most of the night.
The Knights (10-3), ranked 13th by The Inquirer in Southeastern Pennsylvania, picked up only 60 yards and three first downs, with 62 yards coming on two late scoring drives.
"Our defense never came to play like that before," Spahits said. "Everyone was just excited and came together. We were yelling, we were screaming, and we were really just having so much fun. . . . That was the spark."
With the win, Archbishop Wood advanced to next weekend's state semifinals, where it will face Berwick, which beat Clearfield, 44-7, Friday. Wood appeared in the last two AAA championships, winning in 2011.
"It's insane," said Spahits, who transferred from Hatboro-Horsham before the season. "If we lose, we're done. You hand in your equipment and that's the end of my high school career."
If his offensive line plays anything like it did Friday, though, it will carry his career one week longer.
Academy Park 0 0 0 14 - 14
Archbishop Wood 14 7 14 7 - 42
AW: Luke Spahits 8 run (Dan McDonald kick)
AW: Spahits 13 run (McDonald kick)
AW: Jarrett McClenton 5 run (McDonald kick)
AW: Spahits 1 run (McDonald kick)
AW: Joe Dutkiewicz 4 run (McDonald kick)
AW: Dutkiewicz 6 run (McDonald kick)
AP: Jerry Lanier 2 run (run failed)
AP: Lanier 35 run (Lanier run)