You didn't read it careful enough
"The only cam they do not make yet is a 10 speed one that will fit 8 speed levers from 1992 to 1997. Maybe next year. "
If you want to move to 10 speed, you'll need Levers, rear derailleur, rear hub, cassette, and chain. I would guess that your front derailleur will work, since my 8 speed Chorus system works fine with an old Super Record front derailleur.
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