The '55 Merc Royce mentions should have an ECK block, steel oil deflector trays under the rocker arm assemblies, a counter weight attached to the front of the camshaft, and the sheet metal oil drip trough mounted to the front of the engine block just above the crankshaft timing chain gear to aid in getting the oil spread over the timing gear and onto the timing chain. One pan head machine screw holds the oil drip trough to the engine block.
Just because FoMoCo only used these items for two years of production doesn't mean they didn't have purpose and merit in building your next y-block!
Hey, these components are getting harder to find!
NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York