Sugino has two track bottom bracket models.<
The "Superlap" model differs from the standard version by adding mirror-polishing to the races on both spindle and ball cups (a finish that even Campagnolo hasn't offered in many years).
Both versions have spindles are 109 mm. long with symmetrical overhangs, and either of these bottom brackets will match properly with Sugino 75 track or premium Grand Mighty cranks.
Like Sugino's two track cranks, these units are too often overlooked and underrated in a component market long dominated by Campagnolo and Shimano.
I encourage you to give them serious consideration as alternatives to designs of dubious virtue (for track) such as the sealed bearing units now found in current Record and Dura-Ace track models or Shimano's controversial splined crank attachment