70 power steering swap

[C10longwb]

Hey guys I have a 70 c10 Lwb I have converted the front brakes to disc from a 71 setup now I'm considering up dating the steering I'm trying to decide wether I should just replace the sloppy manual box or upgrade it to a power unit. My main question is what all I need to change I know I would have to add a power steering pump and a power steering box but would I have to change the column or will a ps box bolt right up? And would I need to change any of the front suspension will the pitman arm ect... Thanks I'm advance for any advice
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