Is it a same Sugino CV bb as on a Redline 400 or Leary Turbo crankset
If so that means the actual square tapered spindle size is only compatable with the mentioned above
and not normal bb's .
Cuckoo on here does repro 400 bb's
I think I may have had the cranks you have Paul and I had genuine stamped Cooks Bros bearings aswell but the bearing ID was too small for that spindle

I think the bearing cups may have been sold on to Diesel since I owned them