CP's original GP 7's and 9's indeed did run long hood FW. When Rebuilt and the short hood chopped, they became short hood leading.I would still run 'em any way you want. Did CP run any GP7 or GP9s long hood first? That would put the engineer on the other side of the cab.
CP's RS10's and RS18's however are a different matter. Externally similar RS10s an earlier model was set up long hood FW while RS-18s always led short hood.