brwebster posted:Looking back over figures given in Pennsy Power II, seems as if there may have potentially been 8 GP7's so equipped. Eight were equipped with steam boilers so moving reservoirs up top to accommodate a larger fuel tank was certainly possible.
Bruce
Unfortunately. Only three GP7's had rooftop torpedo tubes, DuaL Cab Controls, and cab signaling boxes underneath #8551-8553.
From the Paul Withers book "Pennsylvania Railroad Diesel Locomotive Pictorial" Vol#8.
The Devil is in the details!