sorry for such a lame question, but i couldn't find it on the search,
can i put a shimano 600 tricolour crankset on a modern campagnolio veloce bottom bracket?
If they are both square taper, then yes. Although you may have issues with chainline depending on how long the BB is. In theory you shouldn't mix JIS (Shimano +asian manufacturers) with ISO (Campag +european), but in practice it shouldn't really make much of a difference.