Montini broke through in the fifth with a two-run homer by Alyssa Filkowski – who was 4 for 5 with four RBIs and three runs scored – followed by Nikki Cuchran's 16th home run of the year to make it 7-3.
Cuchran finished 2 for 3 and scored three times, while Emily Alexander added two hits. Lauren Latoria was 3 for 5 with four RBIs.
"They were struggling and once we got them rolling, once we got ... things a little uncomfortable (for Kaneland), we made our move there," Bukovsky said. "The bottom of the order was huge. I can't think of a kid up and down the order who didn't do something to help us at a big time."
Allyson Dilday shined in relief, retiring 13 of the last 14 batters she faced – the only blemish being a home run in the bottom of the fifth that pushed the Kaneland lead to five. It was the only hit she gave up in 4 2/3 innings of relief.
The title was the second in three years for the Broncos, who reached a super-sectional last season.
"To have this situation like I said, something I haven't seen in 34 years, it's unbelievable," Bukovsky said. "You don't think that's going to happen. In the middle of the game you're just trying to neutralize damage and slow their momentum. ... I don't know if deep down inside you ever think you can really do that, but something in you makes you push forward. That's where the grind is. That's what we try to teach all year long."