Mike Gorman and Tommy Heinsohn, in their 30th season together as the NBA's most prolific broadcasting couple, were honored last night in a game-long series of video tributes and vintage footage. The Celtics, not exactly of vintage quality themselves for at least a week, thus had a tough standard to follow against an Indiana Pacers team that had just beat the Knicks in back-to-back games. But with their 92-80 win at the Garden, the C's are once again tied with Chicago for the Eastern Conference lead at 48-18. Leave it to the bench, and a myriad of new combinations by coach Doc Rivers, to turn in one of its best nights since Danny Ainge's Feb. 24 makeover. Led by Jeff Green's 19-point performance, including 17 in a fluid first half, and the surprisingly sharp return of Delonte West, the Celtics bench gave the starters that most precious of gifts. No one, starters included, hit the 30-minute barrier. Ultimately, with a fourth-quarter combination of Green, West, Troy Murphy, Nenad Krstic and Ray Allen on the floor, Rivers was able to take out Allen and Krstic, instead of bringing in his other three starters.