Hi, I am restoring a 1987 Trek 560 Pro and I'm stuck. I have a campy (victory) crank and I can't figure out what size bottom bracket it needs. Here are some pictures:







I know the width is 68 mm, but I can't figure out the length for the life of me. I've been to Sheldon Brown's site, but his section on Campy bottom brackets is sparse. Does anyone know what length bottom bracket I'll need for this project?