On June 11 , 1963 the construction costs for tunnels being lower than expected , Line 2 was extended by two stations at each end .
The new terminus became the Henri - Bourassa and Bonaventure stations .
On June 11 , 1963 the construction costs for tunnels being lower than expected , Line 2 was extended by two stations at each end and the new terminus became the Henri - Bourassa and Bonaventure stations .