W124 Steering Box Interchangability

Are all steering boxes for the W124 chassis interchangable? What are the limitations to swapping if there are any?

To be specific, I have a 1992 300D 2.5 Turbo with a far-too-far-gone steering box and not much money to fix it. So I'm trying to figure out how wide I can cast my net at the ol' pick-a-part, so to speak.

If this is a trickier question than I am assuming, perhaps someone could let me know where such information could be had... But I have to figure this out ASAP 'cause the degree of "wander" has become pretty sketchy at freeway speeds - especially when crossing the SF-OAK Bay Bridge with a strong crosswind! :-o

Thanks, all!
Drew

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