My dad has a 70s Raleigh 10 speed (2x5). Its nice, with 531 frame and Campy components. He has never changed the chain, but would like to do so now. I warned him that the cassette and chainrings may have worn in conjunction with the chain, so he may have problems with changing just the chain. That problem aside, my question is what chain would fit? I'm under the impression that any 3/32 chain would be alright. 6,7,8 speed chains would be 3/32, right? Any version/model I should look for, or features I should avoid?