Rear wheel assy For '77 cb550f

Hi

Looking to fit a 1974 cb550k rear wheel assy on my 1977 cb550f bike. Is this easily don't without spacers and frame mods. Can't seem get any info on it. Or any other suggestions on what to look for?

When I bought the bike it came with a mt90 16in rear rim but I want to have it back to original wheel sizes for handling etc.

Thanks!!

the wheel assembly parts that are not shared between the 550k and the 550f are the spacers on either side of the wheel. The sprocket side spacer is held to the wheel by the sprocket cover. Both spacers are longer on the 550f, so if your wheel assembly is from a 550k, the spacers will be too short. I've included pics with the parts circled.