pretty interesting.I've got a similar problem with a Gitane that has a Suntour crankset on it 53/42 on a modern sealed BB,not bent but the smaller chainring passes very close to the chainstay which looks to have a very short relief bent into it for chainring clearance.Toying with the idea of replacing the 42 with a 40 or 39 in order to get a bit more clearance.
pretty interesting.I've got a similar problem with a Gitane that has a Suntour crankset on it 53/42 on a modern sealed BB,not bent but the smaller chainring passes very close to the chainstay which looks to have a very short relief bent into it for chainring clearance.Toying with the idea of replacing the 42 with a 40 or 39 in order to get a bit more clearance.