Matthews North and Mower, victors of the National and American basketball leagues, will face each other in the I.A.B. tonight at 7 p.m. to determine the Freshman Interleague champion.

Matthews North, which has remained undefeated this season, will base its hopes on greater height and "enough depth to wear them down." Mower, on the other hand, with an 8-1 record, is counting on its "rebounding ability."

The lineups:

Matthews North: Bob Grundeman, lf; Harry Schaeble, rf; Jim Bell, c; Dave Masch, lg; George James, rg.

Mower: Al Goldman, lf; Don Schulman, rf; Arthur Kopit, c; Pat McElroy, rg; Mel Loory, lg.