I am working on restoring a Falcon San Remo I got from my dad. At one point he had a shop replace the original campy crankset with sh600, so they also had to replace the ISO BB with JIS to make that work. So I picked up a nice Campy Record 53/42 which looks a lot better. The Sugino BB didn't offer enough chainring clearance, so I had to replace it. I happily replaced it with a sealed-cartridge Shimano UN55. It fits well enough (SB approves of ISO cranks on JIS square tapers), should last forever, it was dirt cheap ($23 delivered), and it doesn't stick out glaringly like a whole Shimano crankset did!