Manual steering box swap issues

So it's the first time I've swapped steering boxes, but my 75 Duster had power steering from the factory which was shot, I decided to swap it out with a manual steering box a guy gave me that originally on his 72 Duster. The swap itself went perfectly fine but when I went to roll the car onto my trailer... no steering. I ultimately found out the splines aren't engaging from the steering box to the pitman arm. Are the pitman arms different from 72 to 75? Any ideas or help?

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