ok just checking
indexing cassette w/index shifters are new style and freewheel w/friction shift are vintage
so you cant use an index shifter with a freewheel right
and odds are a friction shifter dont work too good with a cassette and indexing derailer of course
so if you change one you have to change all 3 cassette, derailer and shifter right ?

also does rear hub have to be changed ?