This may be a question for the mechanics but the bikes are old. I want to mix and match my bottom bracket. The shell and cups will be Italian, 70 mm and I have an axle for the cups. A also bought a great Stronglight single chainring cottered crank with a Stronglight axle.
My ideal set-up would be the cranks on the Stronglight axle with the Italian cups because the chainline spacing for the Stronglight axle is for a single chainring. The problem with that is the race spacing on the axle is French, for 68 mm, while the shell would be Italian at 70 mm. Can the the adjustable cup accomodate the 2 mm difference?
I do have an Italian axle to go with the cups. The problem with that axle is the cranks don't fit as well, good enogh though, and that axle is spaced for a double chainring. The chain line wouldn't be as good. That said, this will be for a fixie and no gears will be changed. Unless someone has one to offer, tracking down an Italian cottered axle for a single chainring will probably be a pain in the a$$.