Holy Cross of Kensington not only won its 87th consecutive game in high school girls basketball Tuesday but moved from 36 games behind the streak compiled by Lowndes of Valdosta, Ga., to 87 ahead of the four-time Georgia AAAA champions.Valdosta High stopped cross-town rival Lowndes at 122 straight, 83-77 . . .

While Ray Williams of the Knicks was 42-pointing the Bullets, big brother Gus Williams was doing a neat shake-and-bake on the SuperSonics. Seattle was all set to sign its holdout in a Portland huddle that might get the 1979 NBA champions into the 1981 hunt, but Zollie Volchok, Sonic president, said Gus and agent Howard Slusher backed off a one-year deal . . . But forward Kiki Vandeweghe, the reluctant ex-Uclan, has entered the NBA -- not at Dallas, which drafted but failed to sign him; not at L.A. or N.Y., where he would have liked to have been traded; but at Denver. He signed a multiyear contract yesterday and the Maverick's, in return, get Denver's 1981 first-round pick with the teams swapping first-round choices in 1985 and 1986.

Joe Pace of the 1978 champion Bullets recently began a new European basketeering life in St. Albans, Hertfordshire, England. This we learn from Harold Bates of the capital's Executive III community service program, which had ex-Bullet, ex-Italian leaguer Pace on its team that won Baltimore's Project Survival 1980 summer league . . .