This thing is pissed. 250 lbs? Looks like it would eat your average Triton for breakfast. I believe that old Monty and Ward later shortened the name to "Monard". I had a couple old cast alloy, finned rocker oil manifolds with the Monard name cast into the center, but sold them (boo hoo). I still have a NOS Monard finned sump plate for pre-units though.
1965 Cycle World