Hi, I have a vintage Nishiki with Suntour barcon shifters, a 5 speed cluster (14-28) and a suntour vx derailleur. Will my shifters and derailleur work with a 14-32 5 speed freewheel or better yet with a 7 speed 14-34? Nothing is indexed, so I know that will not be a problem. I am assuming I will have to buy a longer chain. I am trying to get a lower gear ration for the hills around here. Thanks for any insight you can give.