Did you have to replace the headset with another JIS one or did you find a way around it? From my googling (and Sheldon), it seems mostly to be the crown race that's different with the rest interchangeable with the standard (ISO) 1" headset.
I got a nos shimano 600 one for £25 from the excellent spa cycles. and tester is spot on with the ebb bolts - I finally rounded the head on one of mine at the end of last year after years of it being not-quite-right. ho hum. will deal with that when this year's tour is a bit more pressing.
Yeah, those are the ones.
Did you have to replace the headset with another JIS one or did you find a way around it? From my googling (and Sheldon), it seems mostly to be the crown race that's different with the rest interchangeable with the standard (ISO) 1" headset.