Cut and deburred the 4.25 x 4.5 opoening in the forward face fo the F-983C fuel valve cover (per figure 3 on page 3 of the ES AIRFLOW FUEL PUMP-1 installation instructions) to make room for the plumbing from the fuel favle to the high pressure fuel pump. Installed 4 platenuts on F-983C fuel falve cover to attach F-7115 fuel pump tom cover.