Lloyd,

Recently I swapped a 10 speed Campy Centaur (long cage) RD for a Deore of about mid 90s vintage on my '83 Paramount. I run 7 speed Sora STX brake/shifters on this bike. On the Campy I had some chatter and inprecise shifts in the middle that I could never fully adjust out. The new Deore shifts perfectly across the wide rage Suntour 7 speed Winner freewheel (13-32 teeth).

I realize this is not a perfect comparison. But if you are picking up the Deore RD for a good price, I'd say it is worth a try. I'll bet it gets the job done and the RD will never know it was built around a 6 speed drivetrain.