I'm using a set of GS550 wheels to adapt to another bike.

The front is done, but I have run into issue with the rear. I am loosely following the lead of another member of the forum I'm active on and he used a rear wheel from a GS550l for the conversion and had no needed modification to the wheel. I purchased a set of wheels sold as '85 GS550l but will need to do significant modification to my current pulley hub:

the wheel I bought (sold as '85 gs550 l 16x2.75)

My question is was there variation of the specs of the cast wheels within the years? Does it matter if you use a set of wheels with the pattern I have or the ones with a more star shaped pattern?
Thank you very much for any clarification anyone can offer.
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