I was given a rather spangly Campag Nuovo Record rear derailleur a while ago, but when I tried to fit it this afternoon, I found out that it wouldn't play nicely with the 24 tooth block. I got either a oodles of chatter as the top jockey wheel was too close to the block, or a jammed drivetrain when using big / middle combinations if the chain was shortened any further.
The bike's a gas pipe Raleigh, so the Nuovo Record is really a bit too good. The gearing is 2x6, with friction shifters.
Any ideas what will work, and look halfway OK? I've currently got an old campag front mech and cranks, so a Campag mech that will work would be a bonus. If not, will the old swirly pattern Shimano 600?

