Like all manufacturers did (in the days before bikes had to have complete groups, thanks shipmano) Bianchi used a little of everything and mixed and matched on bikes for price points and performace.
From what I've seen looking through the '80s catalogs it is almost an Italian who's who of components, GipMe, Ofmega, and Modolo as mentioned, Universal, ITM, TTT, Miche, Rigida and Mavic rims..
Other than Campi the only engraved parts I think is the Ofmega cranks, some ITM stems and I believe TTT seatpost.
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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