Listen to RT and Jim.... you may have to put the socket on and then attach your ratchet if it is close quarters...
It is a bad idea to use the powersteering pump nut to turn the engine because you can get it so tight that you will have trouble getting it off when you need to... and it can be stripped... just no need to take the chance...
How tight can it get you ask ? The PO of TCane's car had done that and it took two heatings with oxygen/acetelyne and shock cooling plus a big hammer to get it off... it clamps the pulley down onto a taper...

Edit, I do know how to spell listen... so much for proofreading ...