Just to add, indexing would be an issue. So don't plan on upgrading to Ergo shift. I tried using an early gen Chorus with 8 speed indexing and it was just never quite right. I'm pretty sure the derailleur itself was made for indexing (7s era), as it had an adjusting barrel, but I gave up and went with a 9s Chorus on the 8s drivetrain. Shifts much better. YMMV