Question: Is it important that the two T-Beam Engine Mounts be exactly the same in appearance, smoothness and/or surface shape or size?

Answer: No. It does not matter.

Better Answer: No. It does not matter. There are several molds that make the T-Beam Engine Mounts and variations in appearance, smoothness, surface shape and/or size can be found between parts made in the different molds. These are a clamp style mount and the top surface of the T-Beam that lies against the engine lugs is flat. The sides and other appearance attributes of the mount do not affect its performance or suitability.