Type 7 built by Kinki Sharyo has been the most reliable trolley since the PCC serving Boston from the mid 1980's. This bit of the E branch is in the street but may change in the future.
The MBTA is very dear to me. The first trains I ever rode as a toddle to teenager were those of the "T" Here is a collection of MBTA Subway and trolley I have found on RP from the 60's thru today.