They won that title again in 1975-76 and advanced through the Ontario playdowns all the way to the Sutherland Cup provincial final against the St. Marys Lincolns of the Western Junior B Hockey League.

St. Marys won the series 4-3, handing Collingwood their only home defeat of the season, in game 7 of the finals.

The Blues played in the Southern Ontario Junior A Hockey League in 1976-77 and finished third out of four teams.

The next season the team was called the Glassmen and compete at the Junior C level.

In 1979, the team changed their name to the Shipbuilders and jumped to the Major Intermediate A Hockey League.