With something significant from which to build, North Carolina will see if it can sustain the momentum following a holiday break.The Tar Heels are back in action for their final nonconference game Sunday night when in-state opponent Campbell visits Chapel Hill, N.C.This will be the first meeting between the programs despite the campuses less than a one-hour drive apart.North Carolina (7-5) rallied to defeat then-No. 18 UCLA on Dec. 21 in New York, its first win over a ranked foe this season.It was a much-needed outcome after numerous late-game disappointments for the Tar Heels.”It’s because we’ve been in those situations against really good competition that allowed us to have the confidence to come back, and then also the experiences of what we needed to do to finish it out and win,” coach Hubert Davis said.North Carolina could turn to more four-guard lineups, Davis said. That’s a deviation from what has worked for the Tar Heels through the years when they’ve been stabilized by a strong post presence.”We may not have tremendous size, but we do have athleticism,” Davis said.The Tar Heels, who have won three of their past four games, insist they’re up to the challenges despite the rocky stretches. They resume Atlantic Coast Conference play next month with three road trips in four games, so working out any kinks in the Campbell game will likely be critical.