Hi ... I have a Honda gasket book that covers every gasket made for the early Hondas and have worked out the following:
cyl gasket, valve stem seal, head gasket, breather, head cover, tensioner holder, 3 of the sets of O rings are all the same in both kits.
The k has an O ring of 11mm not used in the F model.
The F has 6 rubber seal rings, 8 special knock pin, 4 exhaust pipe gaskets that the K series doers not have.
K series part number is 06110-341-000 and the F 06110-392-000
Hope this helps. I sought of only know a bit about the 350F but this book has all the kit parts numbers and individual gasket part numbers.
Genuine Honda Factory Book. Cheers ... Phil in NZ