Dear Paul
When I built my front axle for my 1906 I had the use of an original one in very deplorable condition.
The Truss rod was pinned through the casting. I’m not sure if they changed it on the later cars but I would sand blast around the joint and see what shows up. If it’s brazed you should see some color difference, and if it’s pinned the pin will show up.
Rolly
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