if it fits that is quite a deal. the Special frameset was the beginings of Bianchis "SuperSet" frames and was a as y can see Collaboration with Columbus. the '85 Special tubig was followed by the Formula sets.
this Bianchi looks to be a 85 Nouvo Alloro or Alloro (I do not hav access to my catalogs) Modolo bakes, Ofmega crank, what are the hubs? the rims of course postdate the bike and were likely rebuilt on the Miche(?) hubs?
as state already that will clean up into a fabulous bike. BTW welcome to the Forums and the "Celste Club"
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk