Playing its best game of the season, the East Hampton High School boys basketball team, at full strength at last, routed Harborfields 67-34 here on Jan. 27. In girls track, Greylynn Guyer set an indoor school record in the 3,000-meter race in 10 minutes and 48.90 seconds, and C.J. Echavarria ran a school-record 9.43 seconds in the 55-meter high hurdles.