Good used oil pump idler gear cover; symmetrical; fits 1949, 1950, 1951, 1952, 1953 Ford and Merc passenger and 1948, 1949, 1950, 1951, 1952, 1953 Pickup Flathead Ford V8 blocks.  We have cast iron or stamped steel, specify which you prefer.  Cast iron is shown on left in photos.