Cb900F- 750K swingarm

Hi there,
I just wondered if someone could tell me if a 900F early 80's swingarm would fit on an early 70's K frame?
I am thinking of converting a K with drum to a rear disc but don't want to buy the donor bike unless I get this info.
Any other parts off a 900F that could be incorporated into a K cafe?



Thanks

Steve

later (I think 77 & 78) F model Comstar wheels will give you triple disc brakes. I have them on my 76F. A comp[letely bolt on job since mine came with a rear disc. You will need to revamp the brake pedal (needs to push up rather than forward) and you need to make a rear mastercylinder bracket.