Steering Wheel spline count.

[Aussie Ol' Blue]

Greetings to you all from The land of Oz.

I am a newbie to this site as I am now the proud owner of a genuine 1970 left hooker c20. It's a recent arrival from Utah, I'm told, and is overall in good nick. As with anything this old, it has a few issues and I will be relying on your help, info and guidance, so .. thanks in advance.

My first query is what is the dimension of the shaft of the steering column and what is the spline count? I need a new steering boss for my steering wheel. I'm told it's 3/4 inch and 36 spline. whatever it is, does it share it's dimensions with any other make/model of American car / truck, like impala or caddy?

Cheers,

Chris.