I have an original Ford service book for my 9n. it says in the book to remove the steering wheel.
Wheen I bought the 9n. It had an extension on the steering shaft that raised the steering wheel. The extension was factory made, but never would tighten up right. I left the extension off when i rebult the steering box in 99. last summer I decised to put the extension up on ebay. It sold for $55.00