Four of the MBTA's 19 FP-10s were originally delivered with steam boilers for use with steam-heated ex-NH coaches, as in the case of this pair ready to depart Boston's South Station for Providence, RI. The FP-10s were former Gulf, Mobile & Ohio F3s rebuilt for commuter service by ICG's Paducah shops.
The 70's and 80's were a transition period for the MBTA characterized by an eclectic mix of equipment including Budd RDC's, ex-New Haven stainless steel coaches, and a mix of motive power acquired from various railroads.