Engine including valve lift mechanism with stress reduction features

An engine assembly comprising:

• an engine structure;
• a camshaft rotationally supported on the engine structure, defining a longitudinally extending rotational axis and including a cam lobe;
• and
• a valve lift mechanism supported on the engine structure and defining a body including:
• a longitudinally extending cam engagement surface engaged with the cam lobe at a first location and defining first and second longitudinal end regions opposite one another;
• and
• a first sidewall fixed to the cam engagement surface and including a first portion extending from the cam engagement surface and a second portion extending continuously inward from an end of the first portion toward the second longitudinal end region, a continuous inward extent of the second portion being greater than or equal to a first height at the first location defined from the cam engagement surface to the end of the first portion.