'69 Saginaw P/S pump/pulley experts

I am in process of restoring the saginaw power steering pump for my 69 roadrunner. It is an A/C car. The pulley that was on the pump that came off the car (shown on left) looks to be a '71 pulley (1281 is number on front). I also have a '69 and '70 pulley of the same diameter but their offsets are different. I wanted to use the '69 pulley but its offset is so different, I don't believe it will work.

Also have two Saginaw pumps ... the return on each is different.

Can anyone advise as to the correct pulley/offset and pump return for my application?

Thanks!

Another

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Also, the 69 pulley does not have a keyway. Both of my pumps have provision for a key.

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Also, the 69 pulley does not have a keyway. Both of my pumps have provision for a key.

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That pulley looks like it is for the Federal pump that uses no key or bolt to hold it on.