Found a little more in the 1955-1990 Singles 'Bible' by Joel Whitburn:
"The Glencoves, Teen Folk Trio formed at Chaminade High School in Mineola, Long Island, NY in 1961. Sing/gtr: DON CONNORS and BILL BYRNE with singer BRIAN BOLGER"
May be we can find more with the names of the 3 boys...
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sj