How can I tell if I have a manual steering column or power?

[SGBARRACUDA]

Tittle says it all. I have a 71-72 column but I don't know what it came out of, It is for an A body. How can I tell which column I have?

 

[dano]

The length of the steering shaft and the spline on the coupler.

See post #4.
Factory Steering column length?

 

[SGBARRACUDA]

Forgot about the spline count. Luckily the coupler is still on it so I can check it. Thanks

 

[RedFish]

If we look very close at the steering shaft we can find a pretty weld bead all the way around the final member. So they're all the same length until this member is welded on. Weld at a inch or so from box coupling is power steering shaft. Lay your hand between weld and box coupling with space to spare, its a manual shaft.