The bars are original, the grain is very specific and matches the other parts.
What isn't original is that this engine was originally in a car, the engine hung below the chassis.
The original reversing lever came up through the floor of the car and had a different linkage to the reversing handle.
Those parts disappeared long ago. There are a few complete Toledo steam carriages on Earth, but I haven't seen one in person.
The man who prepared the engine 50+ years ago was a steamboater. He prepared this engine as a spare engine ready to put in a steam launch. Unfortunately he passed before he could make use of it. His widow sold it to a man who had it behind glass in a heated area for 40years in Florida.
-CB